Commands by wytten12

Commands by wytten12 (4)

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Delete all but the last 1000 lines of file
This is sample output - yours may be different.
-2

ex -c '1,$-1000d' -c 'wq' file

wytten12 · 2017-01-10 16:22:57 1
Join lines and separate with spaces

Read vmargs.txt, which is a text file that could either be DOS-style (\r\n) or UNIX-style (\n) line endings and join the lines with a space separator. Can this be shortened/made more elegant? Show Sample Output
This is sample output - yours may be different.
```
(line1) (line2) (line3) ...
```
1

tr -d '\r' < vmargs.txt | tr '\n' ' '

wytten12 · 2016-12-31 18:20:03 2
Reports file systems with disk usage exceeding 90% on the specified host
This is sample output - yours may be different.
0

function df_func { local dfts=$(ssh $1 "df -lP | tail -n +2 | sed 's/%//'"); echo $dfts | awk '$5 > 90 {exit 1}' > /dev/null; if [ $? == 1 ]; then echo -n "$1 "; echo $dfts | awk '$5 > 90 {printf "%s %d%%\n", $6, $5}'; fi }

wytten12 · 2016-03-30 19:57:39 0
Use emacs in place of tail -f

Monitoring a log file with 'tail -f' is handy, but for emacs users monitoring the file with emacs is even better, because you can use all your familiar key bindings for copying regions, etc.
This is sample output - yours may be different.
0

function emon { emacs "$1" --eval '(auto-revert-tail-mode)' --eval '(setq buffer-read-only t)' --eval '(goto-char (point-max))' }

wytten12 · 2012-11-21 17:24:27 0

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insert ip range using vim

fast method for insert ip range using vim

Alias for quick command-line volume set (works also remotely via SSH)

If you're addicted to command-line solutions of ordinary actions or if you just want to set your volume from bed via mobile phone SSH, you can set this alias and use it as $ setvol 50 for setting volume on 50% gain Works only with ALSA, tested on Ubuntu 8.10. Give me some info about your experience. TIP: Try aslo command "mute" to toggle mute/unmute sound. But I don't know if this works on all distros.

resize all JPG images in folder and create new images (w/o overwriting)

Convert all jpegs in the current directory into ~1024*768 pixels and ~ 150 KBytes jpegs

Display current time in requested time zones.

The time zone names come from the tz database which is usually found at /usr/share/zoneinfo.

Install pip with Proxy

Installs pip packages defining a proxy

lazy SQL QUERYING

alias for psql command line; works similar for Oracles sqlplus commandline interface. if you do not provide stdin you will end up in the db shell.

Start an X app remotely

Launch a gui app remotely. In this example smplayer is installed on the remote machine, and movie.avi is in the remote user's home dir. Note that stdout/stderr is still local, so you'll have feedback locally, add '&>/dev/null' to suppress. This is surprisingly not well known (compared to running an X app locally via ssh -X). (NB. if your distro requires ~/.Xauthority file present, then try -fX if you have problems) Resubmitted (and trimmed, thanks sitaram) due to ridiculous voting on previous submission. Fingers crossed, it gets a better rating this time.

Daily watch "question pour un champion" (French TV show)

kaffeine could be replaced by any player able to read mms stream

A nice way to show git commit history, with easy to read revision numbers instead of the default hash

Summary of disk usage, excluding other filesystems, summarised and sorted by size

This command is useful for finding out which directories below the current location use the most space. It is summarised by directory and excludes mounted filesystems. Finally it is sorted by size.

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