Commands by raj77

Commands by raj77_in (4)

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use the previous commands params in the current command

Here the !!:1 will take the first parameter from the previous command. This can be used in conjunction with other history commands like ! and so on. Show Sample Output
This is sample output - yours may be different.
```
Example:
vi a.c
diff !!:1 !!:1.bak
```
16

!!:[position]

raj77_in · 2010-05-24 08:09:23 1
List your installed Firefox extensions

with grep for em:name rather than name, you will get much better result. Show Sample Output
This is sample output - yours may be different.
```
Abduction!
Adblock Plus
Add N Edit Cookies
Add to Search Bar
All-in-One Sidebar
Autocomplete Manager
```
-1

$grep -hIr -m 1 em:name ~/.mozilla/firefox/*.default/extensions|sed 's#\s*##'|tr '<>=' '"""'|cut -f3 -d'"'|sort -u

raj77_in · 2010-05-24 08:03:53 0
kills rapidly spawning processes that spawn faster than you can repeat the killall command

if you dont want to alias also then you can do killall rapidly_spawning_process ; !! ; !! ; !!
This is sample output - yours may be different.
3

alias a=" killall rapidly_spawning_process"; a; a; a;

raj77_in · 2010-05-20 02:33:28 0
What is my ip?

See more details at http://blog.amit-agarwal.co.in/2008/12/01/get-you-ip-address-like-whatismyipcom/ Show Sample Output
This is sample output - yours may be different.
```
122.167.6.97
```
-2

w3m http://amit-agarwal.co.in/mystuff/getip_txt.php will return the ip in text format.

raj77_in · 2009-10-26 02:24:46 0

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journalctl -f

a tail -f variant of systemd journal. Follow the most recent updates or if events are appended to the journal

Perform Real-time Process Monitoring Using Watch Utility

Delete all but the latest 5 files

yes 6 (tail from 6th line)

Numbers guessing game

Felt like I need to win the lottery, and wrote this command so I train and develop my guessing abilities.

Find usb device

I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

Slightly better compressed archives

Avoids creating useless directory entries in archive, and sorts files by (roughly) extension, which is likely to group similar files together for better compression. 1%-5% improvement.

Mapreduce style processing

parallel can be installed on your central node and can be used to run a command multiple times. In this example, multiple ssh connections are used to run commands. (-j is the number of jobs to run at the same time). The result can then be piped to commands to perform the "reduce" stage. (sort then uniq in this example). This example assumes "keyless ssh login" has been set up between the central node and all machines in the cluster. bashreduce may also do what you want.

Update twitter from command line without reveal your password

Update twitter from commandline, without revealing your password and without having to type it interactively. You 'll need to put a line "machine twitter.com login TWITTERUSER password TWITTERPASS" in $HOME/.netrc and better chmod 600 that file.

Set a user password without passwd

Slightly shorter. It doesn't create a subprocess either.

Monitor bandwidth by pid

Nethogs is a useful tool for monitor bandwidth consumption by pid. Tested on Debian an CentOs

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