Commands by funollet

Commands by funollet (4)

sorted by

Run a command if file/directory changes

Example: runonchange /etc/nginx nginx -t Ignores vim temp files. Depends on 'inotify-tools' for monitoring of file changes. Alternative to tools like 'entr', 'watchr'.
This is sample output - yours may be different.
1

runonchange () { local cmd=( "$@" ) ; while inotifywait --exclude '.*\.swp' -qqre close_write,move,create,delete $1 ; do "${cmd[@]:1}" ; done ; }

funollet · 2015-04-08 17:42:03 10
Rerun a command until there are no changes, but no more than N times.

The example runs 'puppet' in a loop for 10 times, but exits the loop before if it returns 0 (that means "no changes on last run" for puppet).
This is sample output - yours may be different.
0

for times in $(seq 10) ; do puppet agent -t && break ; done

funollet · 2013-04-03 14:24:36 7
Get KDE version

Sample input: kde-open -v Qt: 4.7.4 KDE Development Platform: 4.7.3 (4.7.3) KIO Client: 2.0 Show Sample Output
This is sample output - yours may be different.
```
4.7.3 (4.7.3)
```
0

kde-open -v | grep Platform | cut -d' ' -f4-

funollet · 2012-01-19 13:05:26 25
Diff files on two remote hosts.
This is sample output - yours may be different.
16

diff <(ssh alice cat /etc/apt/sources.list) <(ssh bob cat /etc/apt/sources.list)

funollet · 2009-04-03 20:54:16 12

What's this?

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

Share Your Commands

Check These Out

shuffle lines via perl

Same, without modules... Probably smarter option: just use the shuf command or even sort -R.

Convert Squid unixtime logs in human-readable ones

On-the-fly conversion of Unix Time to human-readable in Squid's access.log

Rename files in batch

parrallel execution of a command on remote hosts by ssh or rsh or ...

parrallel execution of a command on remote host by ssh or rsh or ... very useful for cluster management (software update)

save date and time for each command in history

Date-time format: YYYY-MM-DD HH:MM:SS

Print environment information.

Print environment (system) information using Perl.

Save a file you edited in vim without the needed permissions

I often forget to sudo before editing a file I don't have write permissions on. When you come to save that file and get the infamous "E212: Can't open file for writing", just issue that vim command in order to save the file without the need to save it to a temp file and then copy it back again.

Make a zip file with date/time created in the name of the file , zip all sub-directorys

zip -r /tmp/filename-`date +%Y%m%d_%H%M%S`.zip /directory/

HTML5 ogg player

find OGG audio files on your *nix box and listen to them using your web browser

Change host name

With sed you can replace strings on the fly.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands by funollet