Commands by ysangkok

Commands by ysangkok (5)

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list files recursively by size
This is sample output - yours may be different.
1

stat -c'%s %n' **/* | sort -n

ysangkok · 2015-08-25 18:23:55 45
Sort files in $PWD by year embedded anywhere in filename
This is sample output - yours may be different.
-1

ls --color=never -1| grep -E "[0-9]{4}"|sed -re "s/^(.*)([0-9]{4})(.*)$/\2 \1\2\3/" | sort -r

ysangkok · 2014-01-04 20:50:12 11
Create thumbnails and a HTML page for listing them (with links to sources)

The input images are assume to have the "JPG" extension. Mogrify will overwrite any gif images with the same name! Will not work with names with spaces. Show Sample Output
This is sample output - yours may be different.
```
<ul><li><a href='001_9440846553_ohm20131.JPG'><img src='001_9440846553_ohm20131.gif'></a>
```
1

mogrify -format gif -auto-orient -thumbnail 250x90 '*.JPG'&&(echo "<ul>";for i in *.gif;do basename=$(echo $i|rev|cut -d. -f2-|rev);echo "<li style='display:inline-block'><a href='$basename.JPG'><img src='$basename.gif'></a>";done;echo "</ul>")>list.html

ysangkok · 2013-08-25 20:45:49 10
Sum files of certain extension in given directory

Also shows files as they are found. Only works from a tty.
This is sample output - yours may be different.
-1

echo $(find <directory> -name '*.<extension>' -exec du -s {} \; | tee $(tty) | cut -f1 | tr '\n' '+') 0 | bc

ysangkok · 2012-09-17 22:46:50 12
Create a video screencast (capture screen) of screen portion, with audio (the audio you hear, not your mic)

Errors in output don't matter. Stop recording: ctrl-c. Result playable with Flash too. IMPORTANT: Find a Pulse Audio device to capture from: pactl list | grep -A2 'Source #' | grep 'Name: ' | cut -d" " -f2 Show Sample Output
This is sample output - yours may be different.
```
$ cvlc --input-slave pulse://alsa_output.pci-0000_00_1b.0.analog-stereo.monitor screen:// --screen-fps=15 --screen-top=0 --screen-left=0 --screen-width=640 --screen-height=480 --sout='#transcode{vcodec=FLV1,vb=1600,acodec=aac}:std{access=file,mux=ffmpeg{mux=flv},dst=viewport1.flv}'
VLC media player 2.0.1 Twoflower (revision 2.0.1-0-gf432547)
...
<ctrl-c>
$ # // file written
```
2

cvlc --input-slave pulse://<device> screen:// --screen-fps=15 --screen-top=0 --screen-left=0 --screen-width=640 --screen-height=480 --sout='#transcode{vcodec=FLV1,vb=1600,acodec=aac}:std{access=file,mux=ffmpeg{mux=flv},dst=viewport1.flv}'

ysangkok · 2012-04-20 17:55:41 12

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Find passwords that has been stored as plain text in NetworkManager

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Find broken symlinks

To understand why this is the equivalent of "find -L /path/to/search -type l, see http://ynform.org/w/Pub/FindBrokenSymbolicLinks or look at http://www.gnu.org/software/findutils/manual/html_mono/find.html

resize all images in a folder

read squid logs with human-readable timestamp

Run a command as root, with a delay

$ sleep 1h ; sudo command or $ sudo sleep 1h ; sudo command won't work, because by the time the delay is up, sudo will want your password again.

Rescan partitions on a SCSI device

Used this after cloning a disk with dd to make the newly written partitions show up in /dev/

Partition a sequence of disk drives for LVM with fdisk

So, I'm using a CentOS VM in VirtualBox, and created four new disks in the SCSI controller. The VM created the folders: /dev/sda /dev/sdb /dev/sdc /dev/sdd Using a 'for loop' all disks are partitioned for LVM.

Makes the permissions of file2 the same as file1

same as the chmod example, but should also copy extended access control list attributes. deliberately stolen from: $man setfacl

Quick directory bookmarks

Set a bookmark as normal shell variable $ p=/cumbersome/path/to/project To go there $ to p This saves one "$" and is faster to type ;-) The variable is still useful as such: $ vim $p/ will expand the variable (at least in bash) and show a list of files to edit. If setting the bookmarks is too much typing you could add another function $ bm() { eval $1=$(pwd); } then bookmark the current directory with $ bm p

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