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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 09:19:44 236
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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Delete recursively only empty folders on present dir

Fix "broken" ID3 tags in the current directory and subdirectories

Some MP3s come with tags that don't work with all players. Also, some good tag editors like, EasyTAG output tags that don't work with all players. For example, EasyTAG saves the genre as a numeric field, which is not used correctly in Sansa MP3 players. This command corrects the ID3 tags in MP3 files using mid3iconv, which comes with mutagen. To install Mutagen on Fedora use "yum install python-mutagen"

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Testing hard disk writing speed

history autocompletion with arrow keys

This will enable the possibility to navigate in the history of the command you type with the arrow keys, example "na" and the arrow will give all command starting by na in the history.You can add these lines to your .bashrc (without &&) to use that in your default terminal.

validate the syntax of a perl-compatible regular expression

Place the regular expression you want to validate between the forward slashes in the eval block.

Find the package that installed a command

Get all links from commandlinefu front page

You need to install WWW::Mechanize Perl module with # cpan -i WWW::Mezchanize or by searching mechanize | grep perl in your package manager With this command, you can get forms, images, headers too

Show account security settings

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"

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