Important system tools- part-II

This is a second article related to this(system tools) information .You can find the first part here . Ok GNU/Linux come with so many wonderful tools that one entire book will not suffice to write about it.As it visible everywhere.

I do not issue any guarantee that this will work for you.

I am going to take you through some tricky tools GNU/Linux provide to deal with oddity or complexity.Important to understand administrators love these kind tools under thier armory to shoot out problem as precisely as possible ,so they can concentrate on other equally important matters at hand.Time management is one of the key to become a efficent administrator at production environment.

So here we go.

Dmidecode:

A bit of explanation about it first. This tool will reveal the BIOS information of the system .So it's a handy way to know about it without rebooting the system.Most of the distros these days have it in thier respective repositories.

bhaskar@bhaskar-laptop_05:29:31_Thu Sep 02:~> sudo /usr/sbin/dmidecode
# dmidecode 2.10
SMBIOS 2.4 present.
25 structures occupying 1236 bytes.
Table at 0x000F25D2.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
Vendor: Hewlett-Packard
Version: 68MSU Ver. F.03
Release Date: 08/15/2007
Address: 0xE0000
Runtime Size: 128 kB
ROM Size: 1024 kB
Characteristics:
PCI is supported
PC Card (PCMCIA) is supported
PNP is supported
BIOS is upgradeable
BIOS shadowing is allowed
Boot from CD is supported
Selectable boot is supported
EDD is supported
3.5"/720 kB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
8042 keyboard services are supported (int 9h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
ACPI is supported
USB legacy is supported
LS-120 boot is supported
Smart battery is supported
BIOS boot specification is supported
Function key-initiated network boot is supported
Targeted content distribution is supported
BIOS Revision: 15.3
Firmware Revision: 132.14

Handle 0x0001, DMI type 1, 27 bytes
System Information
Manufacturer: Hewlett-Packard
Product Name: Compaq Presario B1200
Version: F.03
Serial Number: CNU8011ZJZ
UUID: 24FEFA40-3A15-E011-3F84-6D9910097D29
Wake-up Type: Power Switch
SKU Number: GP279PA#ACJ
Family: 103C_5335KV

Handle 0x0040, DMI type 126, 42 bytes
Inactive

Handle 0x0002, DMI type 2, 8 bytes
Base Board Information
Manufacturer: Hewlett-Packard
Product Name: 0AC0
Version: KBC Version 84.0E
Serial Number: Not Specified

Handle 0x0003, DMI type 3, 13 bytes
Chassis Information
Manufacturer: Hewlett-Packard
Type: Notebook
Lock: Not Present
Version: Not Specified
Serial Number: CNU8011ZJZ
Asset Tag: CNU8011ZJZ
Boot-up State: Safe
Power Supply State: Safe
Thermal State: Safe
Security Status: External Interface Enabled

Handle 0x0041, DMI type 126, 32 bytes
Inactive

Handle 0x0004, DMI type 4, 35 bytes
Processor Information
Socket Designation: U10
Type: Central Processor
Family: Pentium M
Manufacturer: Intel(R)
ID: FD 06 00 00 FF FB EB BF
Signature: Type 0, Family 6, Model 15, Stepping 13
Flags:
FPU (Floating-point unit on-chip)
VME (Virtual mode extension)
DE (Debugging extension)
PSE (Page size extension)
TSC (Time stamp counter)
MSR (Model specific registers)
PAE (Physical address extension)
MCE (Machine check exception)
CX8 (CMPXCHG8 instruction supported)
APIC (On-chip APIC hardware supported)
SEP (Fast system call)
MTRR (Memory type range registers)
PGE (Page global enable)
MCA (Machine check architecture)
CMOV (Conditional move instruction supported)
PAT (Page attribute table)
PSE-36 (36-bit page size extension)
CLFSH (CLFLUSH instruction supported)
DS (Debug store)
ACPI (ACPI supported)
MMX (MMX technology supported)
FXSR (Fast floating-point save and restore)
SSE (Streaming SIMD extensions)
SSE2 (Streaming SIMD extensions 2)
SS (Self-snoop)
HTT (Hyper-threading technology)
TM (Thermal monitor supported)
PBE (Pending break enabled)
Version: Intel(R) Core(TM)2 Duo CPU T5450 @ 1.66GHz
Voltage: 1.1 V
External Clock: 166 MHz
Max Speed: 1667 MHz
Current Speed: 1667 MHz
Status: Populated, Enabled
Upgrade: None
L1 Cache Handle: 0x0005
L2 Cache Handle: 0x0006
L3 Cache Handle: Not Provided
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified

Handle 0x0005, DMI type 7, 19 bytes
Cache Information
Socket Designation: Internal L1 Cache
Configuration: Enabled, Not Socketed, Level 1
Operational Mode: Write Back
Location: Internal
Installed Size: 64 kB
Maximum Size: 64 kB
Supported SRAM Types:
Burst
Installed SRAM Type: Burst
Speed: Unknown
Error Correction Type: Unknown
System Type: Unified
Associativity: 4-way Set-associative

Handle 0x0006, DMI type 7, 19 bytes
Cache Information
Socket Designation: Internal L2 Cache
Configuration: Enabled, Not Socketed, Level 2
Operational Mode: Write Back
Location: External
Installed Size: 2048 kB
Maximum Size: 2048 kB
Supported SRAM Types:
Burst
Installed SRAM Type: Burst
Speed: Unknown
Error Correction Type: None
System Type: Unified
Associativity: 4-way Set-associative

Handle 0x0007, DMI type 9, 13 bytes
System Slot Information
Designation: PC CARD-Slot 0
Type: 32-bit PC Card (PCMCIA)
Current Usage: Available
Length: Short
ID: Adapter 0, Socket 0
Characteristics:
5.0 V is provided
3.3 V is provided
PC Card-16 is supported
Cardbus is supported
PME signal is supported

Handle 0x0008, DMI type 10, 6 bytes
On Board Device Information
Type: Video
Status: Enabled
Description: 8

Handle 0x0009, DMI type 11, 5 bytes
OEM Strings
String 1: www.hp.com
String 2: ABS 70/71 79 7A 7B 7C

Handle 0x000A, DMI type 16, 15 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 4 GB
Error Information Handle: No Error
Number Of Devices: 2

Handle 0x000B, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x000A
Error Information Handle: No Error
Total Width: 64 bits
Data Width: 64 bits
Size: 512 MB
Form Factor: SODIMM
Set: None
Locator: DIMM #1
Bank Locator: Not Specified
Type: DDR2
Type Detail: Synchronous
Speed: 667 MHz
Manufacturer: Hyundai Electronics
Serial Number: 0000403D
Asset Tag: Not Specified
Part Number: HYMP564S64CP6-Y5

Handle 0x000C, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x000A
Error Information Handle: No Error
Total Width: 64 bits
Data Width: 64 bits
Size: 512 MB
Form Factor: SODIMM
Set: None
Locator: DIMM #2
Bank Locator: Not Specified
Type: DDR2
Type Detail: Synchronous
Speed: 667 MHz
Manufacturer: Hyundai Electronics
Serial Number: 0000403A
Asset Tag: Not Specified
Part Number: HYMP564S64CP6-Y5

Handle 0x000D, DMI type 19, 15 bytes
Memory Array Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x0003FFFFFFF
Range Size: 1 GB
Physical Array Handle: 0x000A
Partition Width: 0

Handle 0x000E, DMI type 20, 19 bytes
Memory Device Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x0001FFFFFFF
Range Size: 512 MB
Physical Device Handle: 0x000B
Memory Array Mapped Address Handle: 0x000D
Partition Row Position: 1

Handle 0x000F, DMI type 20, 19 bytes
Memory Device Mapped Address
Starting Address: 0x00020000000
Ending Address: 0x0003FFFFFFF
Range Size: 512 MB
Physical Device Handle: 0x000C
Memory Array Mapped Address Handle: 0x000D
Partition Row Position: 2

Handle 0x0010, DMI type 22, 26 bytes
Portable Battery
Location: Primary
Manufacturer: Hewlett-Packard
Manufacture Date: 11/13/2007
Serial Number: 27074
Name: HP
Chemistry: Lithium Ion
Design Capacity: 25500 mWh
Design Voltage: 14400 mV
SBDS Version: Not Specified
Maximum Error: Unknown
OEM-specific Information: 0x00000000

Handle 0x0011, DMI type 126, 26 bytes
Inactive

Handle 0x0012, DMI type 32, 11 bytes
System Boot Information
Status: No errors detected

Handle 0x0085, DMI type 133, 34 bytes
OEM-specific Type
Header and Data:
85 22 85 00 01 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00
00 00
Strings:

No battery

Handle 0x0086, DMI type 134, 34 bytes
OEM-specific Type
Header and Data:
86 22 86 00 01 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00
00 00
Strings:



Handle 0x0013, DMI type 144, 26 bytes
OEM-specific Type
Header and Data:
90 1A 13 00 FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF 00 00

Handle 0x0014, DMI type 127, 4 bytes
End Of Table



As you can see it will prodeuce hell lot of information.

Ethtool:

This tools to masure and know information about the attached ethernet card.Like the previous one this tool is also available with most of distributions repository.

bhaskar@bhaskar-laptop_05:37:54_Thu Sep 02:~> sudo /usr/sbin/ethtool -i eth0
driver: tg3
version: 3.108
firmware-version: sb v2.09
bus-info: 0000:18:00.0

bhaskar@bhaskar-laptop_05:38:06_Thu Sep 02:~> sudo /usr/sbin/ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised auto-negotiation: Yes
Speed: Unknown! (65535)
Duplex: Unknown! (255)
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: g
Wake-on: g
Current message level: 0x000000ff (255)
Link detected: no





Blkid:

This tool is for getting the device id ,which is very unique to help the bootloader think properly.In other word not messed up with bootloader if you put this indentification number of disk instead of directly mention them like this /dev/sdX.

bhaskar@bhaskar-laptop_05:48:57_Thu Sep 02:~> sudo /sbin/blkid
Password:
/dev/sda1: UUID="f6f903f1-03cd-4387-933c-8c928514c958" TYPE="ext3" SEC_TYPE="ext2"
/dev/sda2: UUID="a9380f41-173f-41be-8e20-b14fb78eaf9a" TYPE="swap"
/dev/sda3: UUID="3cccbf0e-0354-43b4-b89a-ceee1fcadb31" TYPE="ext3" SEC_TYPE="ext2"
/dev/sda5: LABEL="/" UUID="a217eb70-52b1-4e20-8841-7cb366a54c40" TYPE="ext3"
/dev/sda6: UUID="73917641-fbaf-4910-bf2a-5d86d93fb1ca" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda7: LABEL="Fedora-12-i686-L" UUID="0ba812ef-d38e-4fb6-9a2d-79fcb13768aa" TYPE="ext4"
/dev/sda8: UUID="VwXE29-5Um4-zG0d-PCXe-Anz6-k876-CT3v0G" TYPE="LVM2_member"
/dev/mapper/bhaskarlaptop-data: UUID="09ac6747-95b8-4b62-ac0e-5b80adcd13fe" TYPE="ext3"

It has got so many useful flags through which you can get lot out of it. Please see the manpage reagrding this tool and every tool.

UUID:

As you can understand this is an abbreviation and the full form is "Universally Unique Identifier", which if you can see the previous command on this page; that is apprent from the command output of "blkid" right?

Now if you want to generate a new one means new "Universally Unique Identifier", then you have follow this way,basically it can done by two means one by is generated randomly or through "r" flag of uuidgen binary ot by time base with the help of "-t" flag.Ok I will show you both below:

Time Based:
bhaskar@bhaskar-laptop_06:05:51_Thu Sep 02:~> sudo /usr/bin/uuidgen -t
Password:
0fb2cfd4-b62a-11df-b336-001a4b90dadc

Randomized:
bhaskar@bhaskar-laptop_06:06:43_Thu Sep 02:~> sudo /usr/bin/uuidgen -r
Password:
c31645c4-7d72-493b-a85c-adadd61a0e49

Cool!! right.

Socklist:

As you can guess from the name that this command will going to enlist the socket running on the system for that it turn to /proc file system.

bhaskar@bhaskar-laptop_06:30:19_Thu Sep 02:~> sudo /usr/bin/socklist
type port inode uid pid fd name
tcp 111 7001 0 3010 8 rpcbind
tcp 80 6061 0 4077 3 httpd
tcp 53 5985 0 2792 21 named
tcp 53 5983 0 2792 20 named
tcp 25 6329 0 2904 12 master
tcp 953 5993 0 2792 22 named
tcp 17500 14128 1000 3047 18 dropbox
tcp 646 7030 0 3014 3 famd
tcp 80 0 0 0 0
udp 53 5984 0 2792 513 named
udp 53 5982 0 2792 512 named
udp 17500 14124 1000 3047 15 dropbox
udp 111 6995 0 3010 6 rpcbind
udp 123 5934 0 2791 5 ntpd
udp 641 7000 0 3010 7 rpcbind




Udisks:

This tool will show the system bus service with attached devices.It will spit out quite a verbose information.

bhaskar@bhaskar-laptop_06:37:01_Thu Sep 02:~> sudo /usr/bin/udisks --dump
========================================================================
Showing information for /org/freedesktop/UDisks/devices/dm_2d0
native-path: /sys/devices/virtual/block/dm-0
device: 254:0
device-file: /dev/dm-0
presentation: /dev/dm-0
by-id: /dev/disk/by-id/dm-name-bhaskarlaptop-data
by-id: /dev/disk/by-id/dm-uuid-LVM-gQo1BYHBfV6WxRuYfF3PO3YRgD1QSX7HyRhtgrM7prRmAE41YvqJsbtBRAA9wvdt
by-id: /dev/disk/by-uuid/09ac6747-95b8-4b62-ac0e-5b80adcd13fe
detected at: Wed 01 Sep 2010 10:34:56 PM IST
system internal: 1
removable: 0
has media: 1 (detected at Wed 01 Sep 2010 10:34:56 PM IST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 1
mount paths: /lvm
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 1
presentation name:
presentation icon:
size: 26843545600
block size: 512
job underway: no
usage: filesystem
type: ext3
version: 1.0
uuid: 09ac6747-95b8-4b62-ac0e-5b80adcd13fe
label:
LVM2 Logical Volume:
LV name: data
LV uuid: yRhtgr-M7pr-RmAE-41Yv-qJsb-tBRA-A9wvdt
VG name: bhaskarlaptop
VG uuid: gQo1BY-HBfV-6WxR-uYfF-3PO3-YRgD-1QSX7H

========================================================================
Showing information for /org/freedesktop/UDisks/devices/sda
native-path: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda
device: 8:0
device-file: /dev/sda
presentation: /dev/sda
by-id: /dev/disk/by-id/ata-ST9160821AS_5MA8QHLW
by-id: /dev/disk/by-id/scsi-SATA_ST9160821AS_5MA8QHLW
by-path: /dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0
detected at: Wed 01 Sep 2010 10:34:55 PM IST
system internal: 1
removable: 0
has media: 1 (detected at Wed 01 Sep 2010 10:34:55 PM IST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon:
size: 160041885696
block size: 512
job underway: no
usage:
type:
version:
uuid:
label:
partition table:
scheme: mbr
count: 8
drive:
vendor: ATA
model: ST9160821AS
revision: 3.BHE
serial: 5MA8QHLW
WWN:
detachable: 0
can spindown: 1
rotational media: Yes, unknown rate
write-cache: enabled
ejectable: 0
adapter: /org/freedesktop/UDisks/adapters/0000_3a00_3a1f_2e2
ports:
/org/freedesktop/UDisks/adapters/0000_3a00_3a1f_2e2/host0
similar devices:
media:
compat:
interface: ata
if speed: (unknown)
ATA SMART: Updated at Thu 02 Sep 2010 06:10:21 AM IST
overall assessment: UNKNOWN
===============================================================================
Attribute Current|Worst|Threshold Status Value Type Updates
===============================================================================
raw-read-error-rate 113|100| 6 good 52163879 Pre-fail Online
spin-up-time 99| 99| 0 n/a 0 Old-age Online
start-stop-count 97| 97| 20 good 3771 Pre-fail Online
reallocated-sector-count 100|100| 36 good 0 sectors Pre-fail Online
seek-error-rate 68| 60| 30 good 133359356520 Pre-fail Online
power-on-hours 94| 94| 0 n/a 225.4 days Old-age Online
spin-retry-count 100|100| 34 good 0 Pre-fail Online
power-cycle-count 98| 98| 20 good 2062 Pre-fail Online
attribute-184 100|253| 0 n/a 0 Old-age Online
reported-uncorrect 100|100| 0 n/a 0 sectors Old-age Online
attribute-188 100|100| 45 good 0 Old-age Online
high-fly-writes 90| 90| 0 n/a 10 Old-age Online
airflow-temperature-celsius 52| 36| 0 n/a 48C / 118F Old-age Online
power-off-retract-count 100|100| 0 n/a 213 Old-age Online
load-cycle-count 1| 1| 0 n/a 207899 Old-age Online
temperature-celsius-2 48| 64| 0 n/a 48C / 118F Old-age Online
hardware-ecc-recovered 82| 61| 0 n/a 225063895 Old-age Offline
current-pending-sector 100|100| 0 n/a 0 sectors Old-age Online
offline-uncorrectable 100|100| 0 n/a 0 sectors Old-age Offline
udma-crc-error-count 200|200| 0 n/a 0 Old-age Online
multi-zone-error-rate 100|253| 0 n/a 0 Old-age Offline
ta-increase-count 100|253| 0 n/a 0 Old-age Offline

========================================================================
Showing information for /org/freedesktop/UDisks/devices/sda1
native-path: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1
device: 8:1
device-file: /dev/sda1
presentation: /dev/sda1
by-id: /dev/disk/by-id/ata-ST9160821AS_5MA8QHLW-part1
by-id: /dev/disk/by-id/scsi-SATA_ST9160821AS_5MA8QHLW-part1
by-id: /dev/disk/by-uuid/f6f903f1-03cd-4387-933c-8c928514c958
by-path: /dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0-part1
detected at: Wed 01 Sep 2010 10:34:56 PM IST
system internal: 1
removable: 0
has media: 1 (detected at Wed 01 Sep 2010 10:34:56 PM IST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon:
size: 50001444864
block size: 512
job underway: no
usage: filesystem
type: ext3
version: 1.0
uuid: f6f903f1-03cd-4387-933c-8c928514c958
label:
partition:
part of: /org/freedesktop/UDisks/devices/sda
scheme: mbr
number: 1
type: 0x83
flags:
offset: 32256
alignment offset: 0
size: 50001444864
label:
uuid:

========================================================================
Showing information for /org/freedesktop/UDisks/devices/sda2
native-path: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda2
device: 8:2
device-file: /dev/sda2
presentation: /dev/sda2
by-id: /dev/disk/by-id/ata-ST9160821AS_5MA8QHLW-part2
by-id: /dev/disk/by-id/scsi-SATA_ST9160821AS_5MA8QHLW-part2
by-id: /dev/disk/by-uuid/a9380f41-173f-41be-8e20-b14fb78eaf9a
by-path: /dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0-part2
detected at: Wed 01 Sep 2010 10:34:56 PM IST
system internal: 1
removable: 0
has media: 1 (detected at Wed 01 Sep 2010 10:34:56 PM IST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon:
size: 2303078400
block size: 512
job underway: no
usage: other
type: swap
version: 2
uuid: a9380f41-173f-41be-8e20-b14fb78eaf9a
label:
partition:
part of: /org/freedesktop/UDisks/devices/sda
scheme: mbr
number: 2
type: 0x82
flags:
offset: 50001477120
alignment offset: 0
size: 2303078400
label:
uuid:

========================================================================
Showing information for /org/freedesktop/UDisks/devices/sda3
native-path: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda3
device: 8:3
device-file: /dev/sda3
presentation: /dev/sda3
by-id: /dev/disk/by-id/ata-ST9160821AS_5MA8QHLW-part3
by-id: /dev/disk/by-id/scsi-SATA_ST9160821AS_5MA8QHLW-part3
by-id: /dev/disk/by-uuid/3cccbf0e-0354-43b4-b89a-ceee1fcadb31
by-path: /dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0-part3
detected at: Wed 01 Sep 2010 10:34:56 PM IST
system internal: 1
removable: 0
has media: 1 (detected at Wed 01 Sep 2010 10:34:56 PM IST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon:
size: 13999426560
block size: 512
job underway: no
usage: filesystem
type: ext3
version: 1.0
uuid: 3cccbf0e-0354-43b4-b89a-ceee1fcadb31
label:
partition:
part of: /org/freedesktop/UDisks/devices/sda
scheme: mbr
number: 3
type: 0x83
flags:
offset: 52304555520
alignment offset: 0
size: 13999426560
label:
uuid:

========================================================================
Showing information for /org/freedesktop/UDisks/devices/sda4
native-path: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda4
device: 8:4
device-file: /dev/sda4
presentation: /dev/sda4
by-id: /dev/disk/by-id/ata-ST9160821AS_5MA8QHLW-part4
by-id: /dev/disk/by-id/scsi-SATA_ST9160821AS_5MA8QHLW-part4
by-path: /dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0-part4
detected at: Wed 01 Sep 2010 10:34:56 PM IST
system internal: 1
removable: 0
has media: 1 (detected at Wed 01 Sep 2010 10:34:56 PM IST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon:
size: 1024
block size: 512
job underway: no
usage:
type:
version:
uuid:
label:
partition:
part of: /org/freedesktop/UDisks/devices/sda
scheme: mbr
number: 4
type: 0x05
flags:
offset: 66303982080
alignment offset: 0
size: 93735290880
label:
uuid:

========================================================================
Showing information for /org/freedesktop/UDisks/devices/sda5
native-path: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5
device: 8:5
device-file: /dev/sda5
presentation: /dev/sda5
by-id: /dev/disk/by-id/ata-ST9160821AS_5MA8QHLW-part5
by-id: /dev/disk/by-id/scsi-SATA_ST9160821AS_5MA8QHLW-part5
by-id: /dev/disk/by-uuid/a217eb70-52b1-4e20-8841-7cb366a54c40
by-path: /dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0-part5
detected at: Wed 01 Sep 2010 10:34:56 PM IST
system internal: 1
removable: 0
has media: 1 (detected at Wed 01 Sep 2010 10:34:56 PM IST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 1
mount paths: /
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon:
size: 32901087744
block size: 512
job underway: no
usage: filesystem
type: ext3
version: 1.0
uuid: a217eb70-52b1-4e20-8841-7cb366a54c40
label:
partition:
part of: /org/freedesktop/UDisks/devices/sda
scheme: mbr
number: 5
type: 0x83
flags:
offset: 127138185216
alignment offset: 0
size: 32901087744
label:
uuid:

========================================================================
Showing information for /org/freedesktop/UDisks/devices/sda6
native-path: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda6
device: 8:6
device-file: /dev/sda6
presentation: /dev/sda6
by-id: /dev/disk/by-id/ata-ST9160821AS_5MA8QHLW-part6
by-id: /dev/disk/by-id/scsi-SATA_ST9160821AS_5MA8QHLW-part6
by-id: /dev/disk/by-uuid/73917641-fbaf-4910-bf2a-5d86d93fb1ca
by-path: /dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0-part6
detected at: Wed 01 Sep 2010 10:34:56 PM IST
system internal: 1
removable: 0
has media: 1 (detected at Wed 01 Sep 2010 10:34:56 PM IST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon:
size: 534610944
block size: 512
job underway: no
usage: filesystem
type: ext3
version: 1.0
uuid: 73917641-fbaf-4910-bf2a-5d86d93fb1ca
label:
partition:
part of: /org/freedesktop/UDisks/devices/sda
scheme: mbr
number: 6
type: 0x83
flags: boot
offset: 66304014336
alignment offset: 0
size: 534610944
label:
uuid:

========================================================================
Showing information for /org/freedesktop/UDisks/devices/sda7
native-path: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda7
device: 8:7
device-file: /dev/sda7
presentation: /dev/sda7
by-id: /dev/disk/by-id/ata-ST9160821AS_5MA8QHLW-part7
by-id: /dev/disk/by-id/scsi-SATA_ST9160821AS_5MA8QHLW-part7
by-id: /dev/disk/by-uuid/0ba812ef-d38e-4fb6-9a2d-79fcb13768aa
by-path: /dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0-part7
detected at: Wed 01 Sep 2010 10:34:56 PM IST
system internal: 1
removable: 0
has media: 1 (detected at Wed 01 Sep 2010 10:34:56 PM IST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon:
size: 10742183424
block size: 512
job underway: no
usage: filesystem
type: ext4
version: 1.0
uuid: 0ba812ef-d38e-4fb6-9a2d-79fcb13768aa
label: Fedora-12-i686-L
partition:
part of: /org/freedesktop/UDisks/devices/sda
scheme: mbr
number: 7
type: 0x83
flags:
offset: 66838657536
alignment offset: 0
size: 10742183424
label:
uuid:

========================================================================
Showing information for /org/freedesktop/UDisks/devices/sda8
native-path: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda8
device: 8:8
device-file: /dev/sda8
presentation: /dev/sda8
by-id: /dev/disk/by-id/ata-ST9160821AS_5MA8QHLW-part8
by-id: /dev/disk/by-id/scsi-SATA_ST9160821AS_5MA8QHLW-part8
by-path: /dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0-part8
detected at: Wed 01 Sep 2010 10:34:56 PM IST
system internal: 1
removable: 0
has media: 1 (detected at Wed 01 Sep 2010 10:34:56 PM IST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon:
size: 49557279744
block size: 512
job underway: no
usage: raid
type: LVM2_member
version: LVM2\x20001
uuid: VwXE29-5Um4-zG0d-PCXe-Anz6-k876-CT3v0G
label:
partition:
part of: /org/freedesktop/UDisks/devices/sda
scheme: mbr
number: 8
type: 0x8e
flags:
offset: 77580873216
alignment offset: 0
size: 49557279744
label:
uuid:

========================================================================
Showing information for /org/freedesktop/UDisks/devices/sr0
native-path: /sys/devices/pci0000:00/0000:00:1f.1/host3/target3:0:0/3:0:0:0/block/sr0
device: 11:0
device-file: /dev/sr0
presentation: /dev/sr0
by-path: /dev/disk/by-path/pci-0000:00:1f.1-scsi-0:0:0:0
detected at: Wed 01 Sep 2010 10:34:55 PM IST
system internal: 0
removable: 1
has media: 0
detects change: 1
detection by polling: 1
detection inhibitable: 1
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon:
size: 0
block size: 0
job underway: no
usage:
type:
version:
uuid:
label:
drive:
vendor: Optiarc
model: DVD RW AD-7560A
revision: DH10
serial:
WWN:
detachable: 0
can spindown: 0
rotational media: Yes, unknown rate
write-cache: unknown
ejectable: 1
adapter: /org/freedesktop/UDisks/adapters/0000_3a00_3a1f_2e1
ports:
/org/freedesktop/UDisks/adapters/0000_3a00_3a1f_2e1/host3
similar devices:
media:
compat: optical_cd optical_cd_r optical_cd_rw optical_dvd optical_dvd_plus_r optical_dvd_plus_r_dl optical_dvd_plus_rw optical_dvd_r optical_dvd_ram optical_dvd_rw optical_mrw optical_mrw_w
interface: scsi
if speed: (unknown)
ATA SMART: not available

========================================================================


I have choose to spit out evrythig with the "--dump" option. You can select lot many thing individually by going through the man page of it.

IPCALC:

This tool will aid you to reveal the base internals of an ip address.It helps an network administrator to figure out the subnet/ip range/netmask very easily by one single command.So how it look like ? Here is the output of the command look :

root@bhaskar-laptop_06:45:35_Thu Sep 2:/ # ipcalc 127.0.0.1
Address: 127.0.0.1 01111111.00000000.00000000. 00000001
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Wildcard: 0.0.0.255 00000000.00000000.00000000. 11111111
=>
Network: 127.0.0.0/24 01111111.00000000.00000000. 00000000
HostMin: 127.0.0.1 01111111.00000000.00000000. 00000001
HostMax: 127.0.0.254 01111111.00000000.00000000. 11111110
Broadcast: 127.0.0.255 01111111.00000000.00000000. 11111111
Hosts/Net: 254 Class A, Loopback

You can put any ip-address as an argument.

Ok enough..not to bloat your mind with more information. May be some other related post of mine might reveal bunch of useful tool to navigate through the GNU/Linux system. I have ignored "lsof","lslk","fuser"and many more,because I found that those informations are easily available.

Cheers!
Bhaskar