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Login as another user in shell
This is sample output - yours may be different.
-1

su <username>

dsetton · 2014-02-01 19:45:37 6
shell bash iterate number range with for loop

iterating range of numer with for loop in shell or bash Show Sample Output
This is sample output - yours may be different.
```
10
11
12
13
14
15
16
17
18
19
20
```
-1

rangeBegin=10; rangeEnd=20; for numbers in $(eval echo "{$rangeBegin..$rangeEnd}"); do echo $numbers;done

aysadk · 2019-07-26 09:19:44 234
use curl to resume a failed download

If you are downloading a big file (or even a small one) and the connection breaks or times out, use this command in order to RESUME the download where it failed, instead of having to start downloading from the beginning. This is a real win for downloading debian ISO images over a buggy DSL modem. Take the partially downloaded file and cat it into the STDIN of curl, as shown. Then use the "-C -" option followed by the URL of the file you were originally downloading. Show Sample Output
This is sample output - yours may be different.
```
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 17.1M  100 17.1M    0     0   746k      0  0:00:23  0:00:23 --:--:--  793k
```
-1

cat file-that-failed-to-download.zip | curl -C - http://www.somewhere.com/file-I-want-to-download.zip >successfully-downloaded.zip

linuxrawkstar · 2009-08-05 13:33:06 16
Send web page by e-mail

This will send the web page at $u to recipient@example.com . To send the web page to oneself, recipient@example.com can be replaced by $(whoami) or $USER. The "charset" is UTF-8 here, but any alternative charset of your choice would work. `wget -O - -o /dev/null $u` may be considered instead of `curl $u` . On some systems the complete path to sendmail may be necessary, for instance /sys/pkg/libexec/sendmail/sendmail for some NetBSD.
This is sample output - yours may be different.
-1

{ u="http://twitter.com/commandlinefu"; echo "Subject: $u"; echo "Mime-Version: 1.0"; echo -e "Content-Type: text/html; charset=utf-8\n\n"; curl $u ; } | sendmail $USER

pascalvaucheret · 2010-02-24 04:18:30 5
Better PS aliases

#ps aliases PSO='user,pid,ppid,%cpu,%mem,time,start,state,command' PSOA='user,pid,time,state,command' PSOL='user,pid,ppid,%cpu,%mem,nice,pri,etime,time,tt,state,ucomm' export PSO PSOA PSOL function _ps { /bin/ps $@ ; } alias ps='_ps ax -o $PSO' alias psa='_ps ax -o $PSOA' alias psl='_ps ax -o $PSOL' alias psm='_ps -U $USER -o $PSOA'
This is sample output - yours may be different.
-1

export PSOA='user,pid,time,state,command' ; function _ps { /bin/ps $@ ; } ; alias psa='_ps ax -o $PSOA'

mattmartini · 2010-05-27 02:07:56 3
Move files around local filesystem with tar without wasting space using an intermediate tarball.
This is sample output - yours may be different.
-1

tar -C <source> -cf - . | tar -C <destination> -xf -

Tekhne · 2009-07-10 21:16:23 4
show the log of a branch since its creation

The command show the log of a branch, stopping the output at the time of branch creation.
This is sample output - yours may be different.
-1

svn log . --stop-on-copy

reaper · 2010-02-24 12:37:18 3
Serve current directory tree at http://$HOSTNAME:8080/

Install twistd first with sudo apt-get install python-twistd-web
This is sample output - yours may be different.
-1

twistd -no web

nkorth · 2014-02-01 22:35:50 7
find unmaintained ports that are installed on your system

only works for freeBSD where ports are installed in /usr/ports credit to http://wiki.freebsd.org/PortsTasks
This is sample output - yours may be different.
-1

cd /usr/ports; grep -F "`for o in \`pkg_info -qao\` ; \ do echo "|/usr/ports/${o}|" ; done`" `make -V INDEXFILE` | \ grep -i \|ports@freebsd.org\| | cut -f 2 -d \|

grep · 2009-02-16 21:07:35 8
Go to begin of current command line

Go to begin of the current command line.
This is sample output - yours may be different.
-1

CTRL + a

hardest · 2009-03-23 16:41:04 8
Day Date Time> Instead of $ or # at the terminal
This is sample output - yours may be different.
-1

export PS1='\D{%a %D %T}> '

hemanth · 2009-08-22 08:07:47 4
Go to next dir

Add dirs to list: pushd /tmp /tmp ~ then cd - /home/user cd - /tmp
This is sample output - yours may be different.
-1

cd -

magicjohnson_ · 2011-07-05 05:28:32 6
creates a xkcd #936-style password
This is sample output - yours may be different.
-1

RANGE=`wc -l /usr/share/dict/words | sed 's/^$[0-9]*$ .*$/\1/'`; for i in {1..4}; do let "N = $RANDOM % $RANGE"; sed -n -e "${N}p" /usr/share/dict/words | tr -d '\n'; done; RANGE=100; let "N = $RANDOM % $RANGE"; echo $N

unixmonkey24597 · 2011-08-16 07:04:57 3
share single file in LAN via netcat
This is sample output - yours may be different.
-1

while :; do cat file.txt | nc -l 80; done

kev · 2011-09-15 13:16:20 5
make comments invisible when editing a file

you should choose proper color to make comments invisible.
This is sample output - yours may be different.
-1

vim -c'highlight Comment ctermfg=white' my.conf

kev · 2011-10-21 00:53:03 67
Cloning hard disks over the network:

This is a bit to bit copy so if you have a 500GB hard disk it will take a long time even if have Gigabit Ethernet
This is sample output - yours may be different.
-1

Boot up destination machine with Knoppix live CD and run nc -l -p 9000 | dd of=/dev/sda Then on the master dd if=/dev/sda | nc <dest-ip> 9000 You can monitor bandwidth usage to see progress: nload eth0 -u M

lv4tech · 2009-05-07 05:26:58 6
List files that DO NOT match a pattern

There's no need for ls or grep; printf is builtin to most modern shells
This is sample output - yours may be different.
-1

printf "%s\n" !(pattern) ## ksh, or bash with shopt -s extglob

cfajohnson · 2009-11-26 14:09:56 3
Terrorist threat level text

Numbers are less understandable then words. Also this may put out a different result.
This is sample output - yours may be different.
-1

echo "Terrorist threat level: `sed $(perl -e "print int rand(99999)")"q;d" /usr/share/dict/words`"

houghi · 2011-01-28 09:49:37 4
Generate an XKCD #936 style 4 word password

Doesn't use shuf, its much faster with "shuf -n4" instead of sort -R Show Sample Output
This is sample output - yours may be different.
```
trample tylenol parawing bycatch 
```
-1

sort -R /usr/share/dict/british | grep -v -m4 ^\{1,10\}$ | tr [:upper:] [:lower:] | tr "\n" " " | tr -d "'s" | xargs -0 echo

takac · 2011-08-16 10:11:21 4
multiline re search recursive
This is sample output - yours may be different.
-1

pcregrep --color -M -N CRLF -e "SQLEngine\.\w+\W*$[^$]*\)" -r --include='\.java$'

hute37 · 2012-01-16 09:19:40 6
Show header HTTP with tcpdump

This is a better way to do the "src X or dst X" filter; plus you might not want to bother with DNS lookups (-n).
This is sample output - yours may be different.
-1

tcpdump -s 1024 -l -A -n host 192.168.9.56

wejn · 2013-02-02 22:29:52 5
Dump an aspell dictionary as a word list
This is sample output - yours may be different.
-1

aspell -d en dump master | aspell -l en expand > words

xocoalt · 2014-05-05 21:28:24 7
bored of listing files with ls wanna see them in file browser in gnome try this

Opens the current working directory in the user's preferred application using freedesktop.org's xdg-open.
This is sample output - yours may be different.
-1

xdg-open .

schlaegel · 2010-10-05 04:20:31 6
Convert windows text file to linux text document
This is sample output - yours may be different.
-1

sed 's/.$//' Win-file.txt

totti · 2011-09-15 19:07:51 4
Show the system properties in a Sun VirtualBox server

How to show the system properties of a Sun VirtualBox server
This is sample output - yours may be different.
-1

VBoxManage list systemproperties

0disse0 · 2010-04-23 06:43:49 6
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Empty a file

Immediately make a file empty. This even works if the file is still being written to. Great for cleaning up huge log files!

updatedb for MAC OSX

MAC OSX doesn't come with an updatedb command by default, this will emulate the updatedb thats on a typical Linux OS. Simply add it to your ~/.bash_profile

Given $PID, print all child processes on stdout

Simpler.

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Change pidgin status

Thanks for the comment oshazard, i wasn't aware of purple-remote existence.

Make the "tree" command pretty and useful by default

I got really tired of having tree always show me tons of .svn and .git stuff that I don't care about. With this alias, "tree" uses pretty colors, snazzy line graphics, and ignores any source control and package mumbojumbo. (Customize the *.*.package glob, of course.)

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

change up n directories

Change n directories up, without parameters change one up

Benchmark report generator

Nicely display in html format a detailed report of the machine, including cpu benchmarks.

Converting video file (.flv, .avi etc.) to .3gp

ffmpeg -i = input file name -s = set frame size, qcif=176x144 -vcodec = force video codec -r = frame-rate [default = 25] -b = bit-rate [200 kb/s] -acodec = force audio codec -ab = audio bitrate in bits/s [64k] -ac = no. of audio channels [1] -ar = audio sampling frequency [44100 Hz] optional: -sameq = use same video quality as source (implies VBR) -f = force format -y = overwrite output files

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