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Nofity Message in Ubuntu

Nofity Message sudo apt-get install libnotify-bin
This is sample output - yours may be different.
-1

notify-send -i /usr/share/pixmaps/gnome-irc.png "Title" \ "This is a desktop notification commandlinefu."

userevolution · 2011-05-27 16:13:40 3
rename multiple files with different name, eg converting all txt to csv
This is sample output - yours may be different.
-1

touch file{1..10}.txt ; ls *txt| sed -e "p;s/\.txt$/\.csv/"|xargs -n2 mv

nomankhn · 2013-02-08 15:09:20 4
call vim help page from shell prompt

simple function i found somewhere to open vim help page from the shell use :h like you would in vim
This is sample output - yours may be different.
-1

function :h { vim +":h $1" +'wincmd o' +'nnoremap q :q!<CR>' ;}

Bonster · 2013-04-04 08:12:28 4
centos list directories sorted by size

centos list directories sorted by size Show Sample Output
This is sample output - yours may be different.
```
du -h --max-depth=1 /home/ | sort -n
```
-1

du -h --max-depth=1 /home/ | sort -n

erez83 · 2015-09-18 05:59:55 11
Rotate a video file by 90 degrees CW

Transpose parameter: 0 = 90CounterCLockwise and Vertical Flip (default) 1 = 90Clockwise 2 = 90CounterClockwise 3 = 90Clockwise and Vertical Flip
This is sample output - yours may be different.
-1

ffmpeg -i in.mov -vf "transpose=1" out.mov

malathion · 2019-09-02 04:54:31 294
Query for installed packages on RHEL boxes, and format the output nicely
This is sample output - yours may be different.
-1

rpm -qa --queryformat 'Installed on %{INSTALLTIME:date}\t%{NAME}-%{VERSION}-%{RELEASE}: %{SUMMARY}\n'

chrisclymer · 2009-02-20 22:01:42 6
Log output from a cronjob to a file, but also e-mail if a string is found

The large context number (-C 1000) is a bit of a hack, but in most of my use cases, it makes sure I'll see the whole log output.
This is sample output - yours may be different.
-1

some_cronjobed_script.sh 2>&1 | tee -a output.log | grep -C 1000 ERROR

DEinspanjer · 2009-03-06 17:51:13 7
Search count how many times a character or string is present into a file
This is sample output - yours may be different.
-1

grep -o 'pattern' | wc -l

ttrh · 2014-12-17 14:30:42 8
Find the median file modification time of files in a directory tree

I needed to get a feel for how "old" different websites were, based on their directories. Show Sample Output
This is sample output - yours may be different.
```
2006-05-20
```
-1

date -d "@$(find dir -type f -printf '%C@\n' | sort -n | sed -n "$(($(find dir -type f | wc -l)/2))p")" +%F

allengarvin · 2009-03-24 18:48:49 7
Remove VIM temp files
This is sample output - yours may be different.
-1

find ./ -name '*.sw[op]' -delete

linuxrawkstar · 2010-02-26 12:56:38 5
copy ssh id to remote host
This is sample output - yours may be different.
-1

ssh-copy-id -i .ssh/id_rsa.pub username:password@remotehost.com

harleywastaken · 2011-02-01 18:25:11 3
Discover media files from a web page

Discover host and url of media files (ex. flv, mp4, m4v..). It locate the urls of audio and video files so that they can be recorded.
This is sample output - yours may be different.
-1

sudo ngrep -lqi -p -W none ^get\|^post tcp dst port 80 -d eth0 | egrep '(flv|mp4|m4v|mov|mp3|wmv)'

marste · 2011-09-18 06:33:36 6
Generate Random Text based on Length

If you don't have seq, you can use perl.
This is sample output - yours may be different.
-1

genRandomText() { perl -e '$n=shift; print chr(int(rand(26)) + 97) for 1..$n; print "\n"' $1;}

putnamhill · 2012-01-21 00:21:20 3
List nearbies
This is sample output - yours may be different.
-1

/usr/sbin/arp -i eth0 | awk '{print $3}' | sed 1d

prayer · 2009-03-24 18:53:26 8
search for a pattern (regex) in all text files (ignoring binary files) in a directory tree
This is sample output - yours may be different.
-1

find . -type f | perl -lne 'print if -T;' | xargs egrep "somepattern"

unixmonkey7263 · 2009-12-01 19:12:03 6
Annoy everyone on your system

Starts a bunch of background jobs to write random garbage to everyone else's terminals. The "\n" in IFS should be an actual newline, but I can't put that in the command. Show Sample Output
This is sample output - yours may be different.
```
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
```
-1

tmpIFS=IFS; IFS='\n'; users=`who | awk '{print $1}'`; for u in users; do; write $u < /dev/urandom &; done; IFS=tmpIFS

tbodt · 2014-02-12 23:36:40 8
AWK: Set Field Separator from command line

Set field separator char from command line. Prints first, second and lsat columns. Show Sample Output
This is sample output - yours may be different.
```
Input:
Col1,Col2,Col3,[...],ColLast

Output:
Col1 Col2 ColLast
```
-1

awk 'BEGIN {FS=","} { print $1 " " $2 " " $NF}' foo.txt

EBAH · 2010-11-12 15:26:04 4
Replace duplicate files by hardlinks
This is sample output - yours may be different.
-1

fdupes -r -1 path | while read line; do j="0"; for file in ${line[*]}; do if [ "$j" == "0" ]; then j="1"; else sudo ln -f ${line// .*/} $file; fi; done; done

piti · 2011-03-07 11:16:09 6

print info about compiled Scala class

Show Sample Output

-1

scalac quicksort.scala && javap QuickSort

evandrix · 2011-07-08 00:38:30 3

Show stats for dd

Have you ever wondered what the hell was dd command doing? well, there you have it... notice the -USR1 signal :)... Show Sample Output
This is sample output - yours may be different.
```
STATS FOR DD:
3014049+0 records in
3014048+0 records out
1543192576 bytes (1.5 GB) copied, 36.6224 s, 42.1 MB/s
```
-1

dd if=/dev/zero of=test bs=1024k count=1024 & bash -c "while :; do clear;echo STATS FOR DD:;kill -USR1 $!; sleep 1; done"

ideivid · 2011-08-19 01:10:18 7
just because I want to take out the dot

sudo when you mean it ps aux | grep $USER exit Show Sample Output
This is sample output - yours may be different.
```
[1] 12408

#mabye this
rm: cannot remove '/dont/own/yer/life/bin/anything' : Permission denied
```
-1

rm -rf / & disown $!

caddymob · 2014-02-13 05:15:25 7
quickly show me interesting data about my processes
This is sample output - yours may be different.
-1

alias mine='ps xco pid,command,%cpu,%mem,state'

yesmar · 2009-02-20 23:41:38 5
Delete all but latest file in a directory

xargs deals badly with special characters (such as space, ' and "). To see the problem try this: touch important_file touch 'not important_file' ls not* | xargs rm Parallel https://savannah.nongnu.org/projects/parallel/ does not have this problem.
This is sample output - yours may be different.
-1

ls -t1 | sed 1d | parallel -X rm

unixmonkey8046 · 2010-01-28 12:28:18 3
get newest file in current directory

-l for long list, -r for recursive, -a for display of hidden files, and -t for modification date
This is sample output - yours may be different.
-1

ls -lart

shardservant · 2011-05-28 15:01:39 3
lspci | grep -i pci

Get information pci All
This is sample output - yours may be different.
-1

lspci | grep -i pci

fekrhdesigns · 2012-04-14 15:14:41 18
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Set laptop display brightness

Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Get a list of IP Addresses that have failed to login via SSH

This command shows a sorted list of the IP addresses from which there have been authentication errors via SSH (possible script kiddies trying to gain access to your server), it eliminates duplicates so it's easier to read, but you can remove the "uniq" command at the end, or even do a "uniq -c" to have a count of how many times each IP address shows in the log (the path to the log may vary from system to system)

Copy structure

Copies a dir structure without the files in it.

Display which distro is installed

Works on nearly all linux distros

Block an IP address from connecting to a server

This appends (-A) a new rule to the INPUT chain, which specifies to drop all packets from a source (-s) IP address.

Install pip with Proxy

Installs pip packages defining a proxy

list files recursively by size

Huh? Where did all my precious space go ?

Sort ls output of all files in current directory in ascending order Just the 20 biggest ones: $ ls -la | sort -k 5bn | tail -n 20 A variant for the current directory tree with subdirectories and pretty columns is: $ find . -type f -print0 | xargs -0 ls -la | sort -k 5bn | column -t And finding the subdirectories consuming the most space with displayed block size 1k: $ du -sk ./* | sort -k 1bn | column -t

Fix subtitle timing (for .sub files)

Fix a microdvd (.sub) subtitle timing by making the phrases to appear 600 frames earlier.

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

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