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Convert video file to sequence of images

-i sets the source file -r sets the output frame rate, set it to the same frame rate as the input to output each frame -f sets the output format, trough it might be guessed by the extension
This is sample output - yours may be different.
0

ffmpeg -i source.mpg -r 24 -f image2 still-%6d.png

manuq · 2013-01-10 02:49:15 4
Find .jpg file that is actually thumbs.db

Created to deal with an overzealous batch rename on our server that renamed all files to .jpg files.
This is sample output - yours may be different.
0

file -i `find . -name '*.jpg' -print` | grep "application/msword"

genghisdani · 2013-03-10 16:53:23 6
Replicate a directory structure from a 'basedir' in a remote server.

The directories are created in the local host with the same structure below of a remote base directory, including the 'basedir' in case that it does not exists. You must replace user and remotehost (or IP address) with your proper values ssh will ask for the password of the user in remotehost, unless you had included properly your hostname in the remote .ssh/known_hosts file. Show Sample Output
This is sample output - yours may be different.
```
Password:
mkdir -p /var/opt/example
mkdir -p /var/opt/example/backups
mkdir -p /var/opt/example/logs
mkdir -p /var/opt/example/sent
mkdir -p /var/opt/example/unsent
```
0

ssh user@remotehost "find basedir -type d" | xargs -I {} -t mkdir -p {}

neomefistox · 2013-07-17 07:14:32 12
Batch resize images (overwriting)

The mogrify command is also part of the ImageMagick suite, and is made to make changes to files in place.
This is sample output - yours may be different.
0

mogrify -resize 852x480 *.png

Tenzer · 2013-12-22 15:27:29 13
Create MP3 from text on clipboard (OS X)
This is sample output - yours may be different.
0

pbpaste | say -v Alex -o /tmp/say.aiff && sox /tmp/say.aiff say.mp3

westonruter · 2014-07-07 18:54:29 6
convert png images to jpg and optimize them
This is sample output - yours may be different.
0

ls *.png | cut -d . -f 1 | xargs -L1 -i convert -strip -interlace Plane -quality 80 {}.png {}.jpg

homoludens · 2014-10-29 10:22:03 8
Delete files sorted by dates. Delete all other files except latest N files.
This is sample output - yours may be different.
0

ls -lt | grep ^- | awk 'NR>=N {print $9}' | xargs rm -rf -i

clongbupt · 2015-02-10 06:29:24 8
keep trying a command until it is successful

Keep retrying YOURCOMMAND until it succeeds. Add sleep between retries so that +c works. (Though you can always use +z and kill %1). Source: http://stackoverflow.com/a/5274386/2175968
This is sample output - yours may be different.
0

until YOURCOMMAND; do echo "Retrying"; sleep 2; done

wzhd · 2015-06-03 06:44:24 9
Transcode original FLAC files to downsampled MP3 files in exclusive folder

Make it better.
This is sample output - yours may be different.
0

for i in *.flac; do flac -d -c "${i}" |lame -h --preset 196 --ta "Artist Here" --tl "Disc Title Here" --add-id3v2 - "./MP3/$i.mp3"; done

arlequin · 2016-04-06 13:39:52 12
Auto-kill auto-spawned process

Given a process name (kdiff3 in this example) that keeps auto-spawning/starting, auto-kill until it stops, assuming there is an upper limit (if not, reboot). This was beneficial after I clicked the DIFF button in a git GUI on a merge commit. 2000+ files were being opened one after the other in my diff program (kdiff3). Each time I closed one (or quit Kdiff3), the next file would be auto-opened in Kdiff3.
This is sample output - yours may be different.
0

while [ ! -z $(ps -A | grep -m1 kdiff3 | awk '{print $1}') ]; do kill -9 $(ps -A | grep -m1 kdiff3 | awk '{print $1}'); sleep 1; done

supervisord · 2016-06-07 21:56:44 12
send message to specific remote user

pts/33 is variable you can do before you send message to on which pts the user is following ssh youraccount@192.168.1.168 who
This is sample output - yours may be different.
0

ssh youraccount@192.168.1.168 write toUsername pts/33

aysadk · 2017-07-27 10:25:38 21
Shows only ContainerID, Image, Status and names of running containers.

Usefull, for example, when many ports are exposed and the docker ps output looks cluttered. Show Sample Output
This is sample output - yours may be different.
```
CONTAINER ID        IMAGE                   STATUS              NAMES
8d45df021d81        centos-testing:mongo    Up 34 hours         centos-mongo
d70bsbedaa65        centos-testing:storm    Up 34 hours         centos-storm
3e6dae8e4c68        portainer/portainer     Up 4 days           portainer
```
0

alias dockps='docker ps --format "table {{.ID}}\t{{.Image}}\t{{.Status}}\t{{.Names}}"'

nnsense · 2017-09-18 23:46:47 19
To rotate all PDF pages clockwise:
This is sample output - yours may be different.
0

pdftk in.pdf cat 1-endeast output out.pdf

fabio · 2017-11-17 14:38:39 19
list the last week's added files in xmms2's library
This is sample output - yours may be different.
0

xmms2 mlib search added \> $(echo $(date +%s) - 604800|bc)

unixmonkey6280 · 2009-09-20 04:00:37 4
Find files older than X, using find.

This will find all files in the path "." which are older than 10*24hrs (10 days). This will find any type of file.
This is sample output - yours may be different.
0

find . -mtime +10

rexington · 2010-04-12 14:50:08 3
So you are not sure are connected and iither your router or ethernet card are not working.

You don't need this command often and there are other ways to test output but if you want to be sure if your router and ethernet card are working this is one way. Show Sample Output
This is sample output - yours may be different.
```
12:30:25.973064 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:24:2b:60:33:8d, length 302
12:30:25.979560 IP 192.168.1.1.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, length 303
12:30:48.928099 IP 192.168.1.131.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:24:2b:60:33:8d, length 300
```
0

sudo tcpdump -i eth0 -n port 67 and 68

wsv123456 · 2010-08-18 19:36:06 5
Unix timestamp Solaris

For Solaris to obtain the same as: date+%s like in linux
This is sample output - yours may be different.
0

nawk 'BEGIN {print srand()}'

EBAH · 2011-01-12 16:17:59 18
Look for process by filename in command then kill the process

Outputs the PID of any given file run from a command line... Hope it helps!
This is sample output - yours may be different.
0

ps ax | grep -i ProcessName| kill -9 `awk '/FileName.Ext/ {print $1}'`

bytesabit · 2011-03-24 02:49:49 4
display list of files in a directory sorted by amount of lines different with original.txt.
This is sample output - yours may be different.
0

for f in $(ls -A ./dir); do echo -n $f && diff original.txt ./dir/$f | wc -l ; done | perl -ne 'my $h={}; while (<>) { chomp; if (/^(\S+?)\s*(\d+?)$/){$h->{$1}=$2;} }; for my $k (sort { $h->{$a} $h->{$b} } keys %$h ){ print "$k\t$h->{$k}\n"}'

1vq9 · 2011-11-15 06:02:12 3
Count total amount of code lines in a PHP Project (short version)
This is sample output - yours may be different.
0

find . -type f -name "*.php" -exec wc -l {} +;

KoXa · 2011-12-25 12:01:48 4
Epoch time conversion

0x Show Sample Output
This is sample output - yours may be different.
```
Wed Feb 1 12:41:50 JST 2012
```
0

echo $(date -d @$((0x4f28b47e)))

h_nose · 2012-02-07 11:14:08 15
Number of open connections per ip.

Count on a specific port (80) - FreeBSD friendly. Show Sample Output
This is sample output - yours may be different.
```
 25
```
0

netstat -an | grep 80 | wc -l

mrhassell · 2012-09-05 06:17:09 5
Extract raw audio from video

-i sets the source file -f and -acodec both set the output to be raw audio, PCM signed 16-bit little endian
This is sample output - yours may be different.
0

ffmpeg -i source.mpg -f s16le -acodec pcm_s16le audio.raw

manuq · 2013-01-10 02:54:04 12
find ip address in all files in /etc directory

find ip address in all files in /etc directory. can be used to find any string in any directory really
This is sample output - yours may be different.
0

find /etc -type f -print0 | xargs -r0 grep --color '192.168.0.1'

jakezp · 2013-04-30 15:03:20 9
Create a csv file with '5-digits prefix' phone numbers, as well as occurrences per prefix

dumpfile is a CSV file, which its 1st field is a phone number in format CC+10 digits Empty lines are deleted, before the output in format "prefix,ocurrences" Show Sample Output
This is sample output - yours may be different.
```
$ cat SubsxPrefix.csv
52551,392
52842,93
52843,193
```
0

cut -d, -f1 /var/opt/example/dumpfile.130610_subscriber.csv | cut -c3-5 | sort | uniq -c | sed -e 's/^ *//;/^$/d' | awk -F" " '{print $2 "," $1}' > SubsxPrefix.csv

neomefistox · 2013-07-17 07:58:56 6
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What's this?

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ignore .DS_Store forever in GIT

With a couple of little commands, you?ll be able to ignore the .DS_Store files forever from your git repositories on mac! The following command will add the .gitignore file to the git configuration git config --global core.excludesfile ~/.gitignore then, the following, will add the .DS_Store to the list echo .DS_Store >> ~/.gitignore

vi a remote file

notice the double slash

rsync...

get time in other timezones

On Ubuntu, if tzwatch is installed, then you can call up in terminal the output for every time zone configured in gWorldClock.

list files in mtime order

Simple but useful; list files in the current directory in mtime order. Useful if you've been working on something and then take a day or two off.

Copy structure

Clone directory structure without the files

generate 30 x 30 matrix

or $ od /dev/urandom -w60 -An|sed 's/ ..../ /g'|head -n 30 (this one lacks digits 8 and 9)

Delicious search with human readable output

You can install filterous with $ sudo apt-get install libxslt1-dev; sudo easy_install -U filterous

Oneliner to get domain names list of all existing domain names (from wikipedia)

Quietly get a webpage from wikipedia: curl -s By default, don't output anything: sed -n Search for interesting lines: /<tr valign="top">/ With the matching lines: {} Search and replace any html tags: s/<[^>]*>//g Finally print the result: p

Automatically skip bad songs in your MPD playlist.

Case insensitive. Also you can pull in the songs from a blacklist, one per line - while :; do (mpc current | grep -i -f blacklist.txt && mpc next); sleep 5; done

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