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commandlinefu.com is the place to record those command-line gems that you return to again and again.

Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.


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Universal configuration monitoring and system of record for IT.
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May 19, 2015 - A Look At The New Commandlinefu
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Use file(1) to view device information

Terminal - Use file(1) to view device information
file -s /dev/sd*
2010-12-28 09:56:03
User: mhs
Functions: file
24
Use file(1) to view device information

file(1) can print details about certain devices in the /dev/ directory (block devices in this example). This helped me to know at a glance the location and revision of my bootloader, UUIDs, filesystem status, which partitions were primaries / logicals, etc.. without running several commands.

See also:

file -s /dev/dm-* file -s /dev/cciss/*

etc..

Alternatives

There are 2 alternatives - vote for the best!

Terminal - Alternatives
lsblk -o NAME,TYPE,FSTYPE,LABEL,SIZE,MODEL,MOUNTPOINT
2012-09-12 15:30:25
User: BasketCase
3

Shows all block devices in a tree with descruptions of what they are.

blkid -c /dev/null
2012-09-12 13:34:41
User: mhs
2

`blkid` is an interface to libuuid - it can read Device Mapper, EVMS, LVM, MD, and regular block devices.

-c /dev/null - Do not use cached output from /etc/blkid.tab or /etc/blkid/blkid.tab (RHEL)

-i - Display I/O Limits (aka I/O topology) information (not available in RHEL)

-p - Low-level superblock probing mode (not available in RHEL)

sudo file -bs /dev/sda | sed -e 's/.*partition 1\(.*\) code offset.*/partition 1\1/g' -e 's/\(.\);/\1\n/g'
fsarchvier probe simple
0

Another alternative to blkid, lsblk, file -s, cat /proc/paritions, fdisk -l, etc..

sudo file -bs /dev/sda | sed -e 's/.*partition 1\(.*\) code offset.*/partition 1\1/g' -e 's/\(.\);/\1\n/g'

Know a better way?

If you can do better, submit your command here.

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