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Clean or clean pacman and pamac cache
This is sample output - yours may be different.
0

sudo pacman -Scc && pamac clean -b

bugmenot · 2022-08-24 19:10:38 552
Generate MD5 hash for a string

A useful way to generate the MD5 hash for a string by command line Show Sample Output
This is sample output - yours may be different.
```
:~$ echo -n "string" | md5sum -
b45cffe084dd3d20d928bee85e7b0f21  -
```
0

echo -n "string" | md5sum -

cryptema · 2009-03-10 21:01:36 7

This command creates tar zip of a directory and its sub-directories. Show Sample Output

tar cvfz dir_name.tgz dir/

unixmonkey6220 · 2009-09-15 10:20:20 4

sort selected lines in a text file to the beginning or end of the file.

This function is used to sort selected lines of a text file to the end of that file. Especially useful in cases where human intervention is necessary to sort out parts of a file. Let's say that you have a text file which contains the words rough slimy red fluff dough For whatever reason, you want to sort all words rhyming with 'tough' to the bottom of the file, and all words denoting colors to the top, while keeping the order of the rest of the file intact. '$EDITOR' will open, showing all of the lines in the given file, numbered with '0' padding. Adding a '~' to the beginning of the line will cause the line to sort to the end of the file, adding '!' will cause it to sort to the beginning. Show Sample Output
This is sample output - yours may be different.
```
$ 2end /tmp/2end.txt
~000001 rough
000002  slimy
!000003 red
~000004 fluff
000005  dough
$ cat /tmp/2end.txt 
red
slimy
dough
rough
fluff
```
0

2end () ( export LC_ALL=C; nl -n rz $1 > $1.tmp; ${EDITOR:-vi} $1.tmp; sort $1.tmp | sed -r 's/^.*[0-9]+\t+//' > $1; rm $1.tmp; )

bartonski · 2010-03-06 23:02:28 6
Setting gdb in memory allocation debugging mode under MAC OS X

setting gdb with this option / breakpoint before running the process will cause it to break whenever an memory allocation operation is not kosher.
This is sample output - yours may be different.
0

set env DYLD_INSERT_LIBRARIES = /usr/lib/libgmalloc.dylib;b szone_error

frank514 · 2010-10-13 20:25:48 3
Sum file sizes

Computes total size of files in a directory. This value is different "du -b" because doesn't includes directory sizes. Show Sample Output
This is sample output - yours may be different.
```
9346375
```
0

find . -type f -printf %s\\n | paste -sd+ | bc

rubenmoran · 2011-02-10 09:44:36 3
Correct spellings in directory names

Use shopt -s cdspell to correct the typos in the cd command Show Sample Output
This is sample output - yours may be different.
```
Use shopt -s cdspell to correct the typos in the cd command
```
0

shopt -s cdspell

ankush108 · 2012-06-26 17:28:57 3
Sort I/O activity by PID number.
This is sample output - yours may be different.
0

for i in $(ps -eo pid|grep -v PID);do echo ""; echo -n "==$i== ";awk '/^read|^write/{ORS=" "; print}' /proc/$i/io 2>/dev/null; echo -n " ==$i=="; done|sort -nrk5|awk '{printf "%s\n%s %s\n%s %s\n%s\n\n",$1,$2,$3,$4,$5,$6}'

omatictost · 2012-10-25 17:16:24 4
List all text files (exclude binary files)
This is sample output - yours may be different.
0

find -type f | xargs file | grep ".*: .* text" | sed "s;$.*$: .* text.*;\1;"

phunehehe · 2012-12-24 07:53:52 5
autocreate git tag
This is sample output - yours may be different.
0

git tag rel--`date +%Y-%m-%d--%H-%M-%S` -m "(%) rel: stage"

unixmonkey14859 · 2014-02-28 13:44:49 6
Shorthand for proper mktemp inside $TMPDIR

Show Sample Output
This is sample output - yours may be different.
```
$ mktemp!
/var/folders/n6/b4tw86zn431gttc376hzwzqm0000gn/T/.2llSc7JxFa

$ mktemp! file.o
/var/folders/n6/b4tw86zn431gttc376hzwzqm0000gn/T/file.o.uSGsnVJeGd
```
0

mktemp!() { mktemp $TMPDIR$1.XXXXXXXXXX }

welldan97 · 2014-06-11 07:40:50 7
Get user's full name in Mac OS X
This is sample output - yours may be different.
0

finger $(whoami) | perl -ne '/Name: ([a-zA-Z0-9 ]{1,})/ && print "$1\n"'

zil0g · 2014-09-30 11:37:47 11
Secure netcat chat - SSH

client: nc localhost 9876
This is sample output - yours may be different.
0

ssh hostname nc -l 9876

snipertyler · 2015-01-14 20:11:50 12
svn diff ignore whitespace

get subversion diff output without distracting whitespace changes. good for when you are cleaning up code to make sure you didn't change anything important. also useful when working with old code, or someone else's code.
This is sample output - yours may be different.
0

svn diff --diff-cmd diff -x -uw /path/to/file

katylava · 2009-02-10 20:39:54 42
Fix UTF-8 text files misinterpreted as ISO 8859-1 due to Byte Order Mark (BOM) of the Unicode Standard.

Fixes the faulty files with perl, which may exist on more platforms
This is sample output - yours may be different.
0

perl -i -pe 's/\xef\xbb\xbf//g' <file>

pfredrik · 2009-09-15 11:22:43 4
Print a row of 50 hyphens
This is sample output - yours may be different.
0

python -c 'print "-" * 50'

4Aiur · 2010-01-07 13:11:44 4
Get current Xorg resolution via xrandr

To show your current resolution on your desktop Show Sample Output
This is sample output - yours may be different.
```
2960x1050
```
0

xrandr -q|sed -n 's/.*current[ ]$[0-9]*$ x $[0-9]*$,.*/\1x\2/p'

chmouel · 2010-02-02 10:00:31 4
Python: Quickly locate site-packages
This is sample output - yours may be different.
0

python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()"

evandrix · 2011-06-09 16:00:51 4
Scrape all RBLs off the anti-abuse.org site
This is sample output - yours may be different.
0

lynx -dump http://www.anti-abuse.org/multi-rbl-check/ | grep ']' | awk -F\] '{ print $2 }' | sed '/^\[/d' | egrep -v ^[A-Z]

audiopathix · 2011-09-30 03:52:29 5
place wifi card into monitor mode

This command will place your card into monitor mode. Gets around the "ioctl(SIOCSIWMODE) failed: Device or resource busy" error encountered when running airodump-ng. Show Sample Output
This is sample output - yours may be different.
```
wlan0     IEEE 802.11abgn  Mode:Monitor  Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
```
0

iwconfig wlan0 mode monitor

ozzy · 2011-11-04 02:36:42 15
Compare latest changes in locally edited file with SVN copy of a file

If you have ever edited a locally checked out version of a file to tweak it for testing purposes, and came back to it over a weekend, you might have forgotten what you exactly changed. This command helps you see the differences between the the checked in SVN version, and the one you tweaked. Show Sample Output
This is sample output - yours may be different.
```
bbbco> /home/bbbco/selenium/tests/src/com/bbbco/standardtest>svn diff StandardTest.java 
200c200
<             sInterface.waitForPage(minTime);
---
>             sInterface.waitForPage(maxTime);
271c271
< }
\ No newline at end of file
---
> }
```
0

svn diff <FILE>

bbbco · 2012-01-30 16:47:48 14
Prefix file contents with filename
This is sample output - yours may be different.
0

for i in *; do sed -i "s/^/$i: /" $i; done

flatcap · 2012-03-09 13:07:13 3
Count empty lines using grep

This pattern matches empty lines in the file and -c gives the count
This is sample output - yours may be different.
0

grep -c "^$" filename

ankush108 · 2012-06-26 17:43:17 8
AWK example of using substr + index to print strings in an unknown position.
This is sample output - yours may be different.
0

awk '{word=(substr($0,index($0,"blah"),5));print word}'

omatictost · 2012-10-25 17:52:05 5
Displays mpd playing status in the terminal first raw

Actually this is a shorter version that fits the 255 chars limit of this resource. The full version shows status in the right top corner: alias mpdd='while sleep 1; do _r=$(awk '\''BEGIN{FS=": "}/^Artist:/{r=r""$2};/^Title:/{r=r" - "$2};/^time:/{r=$2" "r};/^state: play/{f=1}END{if(f==1){print r}}'\'' <(mpc status;mpc currentsong));_l=${#_r};[ $_l -eq 0 ] && continue;[ -z "$_p" ] && _p=$_l;echo -ne "\e[s\e[0;${_p}H\e[K\e[u";_p=$((COLUMNS - _l));echo -ne "\e[s\e[0;${_p}H\e[K\e[0;44m\e[1;33m${_r}\e[0m\e[u";done &' mpc is defined like this: function mpc() { echo "$*" | nc 192.168.1.1 6600 } Show Sample Output
This is sample output - yours may be different.
```
132:245 Front 242 - 7Rain [GHost]
```
0

while sleep 1; do (mpc status;mpc currentsong)|awk 'BEGIN{FS=": "}/^Artist:/{r=r""$2};/^Title:/{r=r" - "$2};/^time:/{r=$2" "r};/^state: play/{f=1}END{if(f==1){print r}}'|echo -ne "\e[s\e[0;0H\e[K\e[0;44m\e[1;33m$(cat -)\e[0m\e[u";done &

ichbins · 2012-12-24 18:03:29 8
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List Threads by Pid along with Thread Start Time

This command will list all threads started by a particular pid along with the start time of each thread. This is very valuable when diagnosing thread leaks.

Capitalize first letter of each word in a string - A ruby alternative

"-n" loops around ; "-e" executes the given quoted string ; "$_" is the current line ; "split" creates an array on white space; each item of the array is "collected" to be then "capitalized" ; the array is "joined" back into a string.

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"

Remove git branches that do not have a remote tracking branch anymore

Selecting a random file/folder of a folder

I used only shuf command.

trace the system calls made by a process (and its children)

strace can be invaluable in trying to figure out what the heck some misbehaving program is doing. There are number of useful flags to limit and control its output, and to attach to already running programs. (See also 'ltrace'.)

Install a new kernel in Manjaro linux

00 is the number of the linux kernel e.g. linux39

Create a bunch of dummy text files

Convert GoogleCL gmail contacts to cone adress book

Full Command: $ google contacts list name,name,email|perl -pne 's%^((?!N\/A)(.+?)),((?!N\/A)(.+?)),([a-z0-9\._-]+\@([a-z0-9][a-z0-9-]*[a-z0-9]\.)+([a-z]+\.)?([a-z]+))%${1}:${3} %imx'|grep -oP '^((?!N\/A)(.+?)) ' | sort You'll need googlecl and python-gdata. First setup google cl via: $ google Then give your PC access $ google contacts list name,email Then do the command, save it or use this one to dump it in the cone-address.txt file in your home dir: $ google contacts list name,name,email | perl -p -n -e 's%^((?!N\/A)(.+?)),((?!N\/A)(.+?)),([a-z0-9\._-]+\@([a-z0-9][a-z0-9-]*[a-z0-9]\.)+([a-z]+\.)?([a-z]+))%${1}:${3} %imx' | grep -o -P '^((?!N\/A)(.+?)) ' | sort > ~/cone-adress.txt Then import into cone. It filters out multiple emails, and contacts with no email that have N/A. (Picasa photo persons without email for example...)

directly ssh to host B that is only accessible through host A

Of course you need to be able to access host A for this ;-)

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