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Upload - rsync using key pair

Connect EC2 server with public keys "/root/.ec2/id_rsa-gsg-keypair" or "/root/.ec2/keypair.pem"
This is sample output - yours may be different.
-2

rsync -avvvz -e "ssh -i /root/.ec2/id_rsa-gsg-keypair" --archive --progress /root/.ec2/id_rsa-gsg-keypair root@ec2-75-101-212-113.compute-1.amazonaws.com:/root

svnlabs · 2010-01-22 16:53:42 4
Project Zipped

Project Zipped
This is sample output - yours may be different.
-5

zip -r -9 /var/www/html/project.zip /var/www/html/project

svnlabs · 2010-01-22 16:51:11 3
Get Memeory Info

Get Memeory Info
This is sample output - yours may be different.
-1

cat /proc/meminfo

svnlabs · 2010-01-22 16:48:03 3
Check RAM size

Check RAM size
This is sample output - yours may be different.
7

free -mto

svnlabs · 2010-01-22 16:46:50 4
Insert the last argument of the previous command
This is sample output - yours may be different.
12

<ALT> .

new_user · 2010-01-22 15:06:26 10
Insert the last argument of the previous command
This is sample output - yours may be different.
24

<ESC> .

wincus · 2010-01-22 14:27:44 19
Extract all 7zip files in current directory taking filename spaces into account
This is sample output - yours may be different.
-7

savesIFS=$IFS;IFS=$(echo -en "\n\b"); for items in `ls *.7z`; do 7zr e $items ; done; IFS=$saveIFS

BCK · 2010-01-22 14:16:09 7
Find unused IPs on a given subnet

Somewhat shorter version. Show Sample Output
This is sample output - yours may be different.
```
...
192.168.0.226
192.168.0.227
...
```
4

fping -r1 -g <subnet> 2> /dev/null | grep unreachable | cut -f1 -d' '

unixmonkey7953 · 2010-01-22 09:07:04 3
Find unused IPs on a given subnet
This is sample output - yours may be different.
1

nmap -sP <subnet>.* | egrep -o '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' > results.txt ; for IP in {1..254} ; do echo "<subnet>.${IP}" ; done >> results.txt ; cat results.txt | sort -n -t . -k 1,1 -k 2,2 -k 3,3 -k 4,4 | uniq -u

bortoelnino · 2010-01-22 00:26:42 4
Linux zsh one-liner to Determine which processes are using the most swap space currently

Col 1 is swapped sum in kb Col 2 is pid of process Col 3 is command that was issued Show Sample Output
This is sample output - yours may be different.
```
 4428 9187 python/usr/share/system-config-printer/applet.py
 2012 9163 gnome-panel
 1516 9127 /usr/lib/gnome-settings-daemon/gnome-settings-daemon
 1408 18899 /usr/lib/gvfs/gvfsd-smb--spawner:1.9/org/gtk/gvfs/exec_spaw/4
 1040 1681 gnome-terminal
```
0

for i in $(ps -ef | awk '{print $2}') ; { swp=$( awk '/Swap/{sum+=$2} END {print sum}' /proc/$i/smaps ); if [[ -n $swp && 0 != $swp ]] ; then echo -n "\n $swp $i "; cat /proc/$i/cmdline ; fi; } | sort -nr

cbrinker · 2010-01-22 00:09:46 11
Create unique email addresses directly from the US census site*Full command in comments

** Replace the ... in URLS with: www.census.gov/genealogy/www/data/1990surnames Couldn't fit in 256 Created on Ubuntu 9.10 but nothing out of the ordinary, should work anywhere with a little tweaking. 5163 is the number of unique first names you get when combine the male and female first name files from. http://www.census.gov/genealogy/www/data/1990surnames/names_files.html Show Sample Output
This is sample output - yours may be different.
```
stasia.palmer@test.domain
mozell.sybounheuan@test.domain
yuki.nypaver@test.domain
annamae.tilbury@test.domain
jaimee.warfield@test.domain
cassidy.mchugh@test.domain
daniele.makey@test.domain
ivelisse.besancon@test.domain
marylin.kocher@test.domain
```
0

paste -d "." <(curl http://.../dist.female.first http://.../dist.male.first | cut -d " " -f 1 | sort -uR) <(curl http://..../dist.all.last | cut -d " " -f 1 | sort -R | head -5163) | tr "[:upper:]" "[:lower:]" | sed 's/$/@test.domain/g'

connorsy · 2010-01-21 19:52:28 3
delete duplicate lines from a file and keep the order of the other lines

i wanted to delete all duplicate lines from .bash_history and keep the order of the other lines. the command cat's the file and adds line numbers, then sorts by the second column. afterwards uniq omits repeated lines, but skips the first field (the line number). then it sorts by the line numbers and at the end cuts the numbers off.
This is sample output - yours may be different.
4

cat -n <file> | sort -k 2 | uniq -f 1 | sort -n | cut -f 2-

fpunktk · 2010-01-21 18:55:58 11
show tcp syn packets on all network interfaces
This is sample output - yours may be different.
0

tcpdump -i any -n tcp[13] == 2

wincus · 2010-01-21 14:18:16 3
List your Boxee queue

Might be able to do it in less steps with xmlstarlet, although whether that would end up being shorter overall I don't know - xmlstarlet syntax confuses the heck out of me. Prompts for your password, or if you're a bit mental you can add your password into the command itself in the format "-u user:password". Show Sample Output
This is sample output - yours may be different.
```
queued  Youtube video
queued  TEDTalks : The amazing intelligence of crows - Joshua Klein
queued  The Fresh Prince of the Dark Side Pranks Christian TV
queued  Grand Theft Auto: Chinatown Wars
queued  Flight of the Conchords Ep 6 Bret, You've got it Going On
```
0

curl -u <username> http://app.boxee.tv/api/get_queue | xml2 | grep /boxeefeed/message/description | awk -F= '{print $2}'

Strawp · 2010-01-20 16:17:19 547
Play back shell session recorded using the

This command will play back each keystroke in a session log recorded using the script command. You'll need to replace the ^[ ^G and ^M characters with CTRL-[, CTRL-G and CTRL-M. To do this you need to press CTRL-V CTRL-[ or CTRL-V CTRL-G or CTRL-V CTRL-M. You can adjust the playback typing speed by modifying the sleep. If you're not bothered about seeing each keypress then you could just use: cat session.log Show Sample Output
This is sample output - yours may be different.
```
$ script session.log
Script started, file is session.log
$ pwd
/home/jon
$ exit
Script done, file is session.log


$ (IFS=; sed 's/^[]0;[^^G]*^G/^M/g' session.log | while read -n 1 ITEM; do [ "$ITEM" = "^M" ] && ITEM=$'\n'; echo -ne "$ITEM"; sleep 0.05; done; echo)
Script started on Wed 20 Jan 2010 15:56:36 GMT
$ exit
Script done on Wed 20 Jan 2010 15:56:45 GMT
```
0

(IFS=; sed 's/^[]0;[^^G]*^G/^M/g' <SessionLog> | while read -n 1 ITEM; do [ "$ITEM" = "^M" ] && ITEM=$'\n'; echo -ne "$ITEM"; sleep 0.05; done; echo)

jgc · 2010-01-20 16:11:32 5
Print the contents of $VARIABLE, six words at a time

Print out the contents of $VARIABLE, six words per line, ignoring any single or double quotes in the text. Useful when $VARIABLE contains a sentence that changes periodically, and may or may not contain quoted text.
This is sample output - yours may be different.
1

echo $VARIABLE | xargs -d'\40' -n 6 echo

SuperFly · 2010-01-20 15:12:53 4
Exclude .svn, .git and other VCS junk for a pristine tarball

~$ tar --version tar (GNU tar) 1.20
This is sample output - yours may be different.
29

tar --exclude-vcs -cf src.tar src/

hendry · 2010-01-20 10:16:17 14
remove at jobs

Removes all the at shedules jobs
This is sample output - yours may be different.
0

atrm $(atq|cut -f1)

frans · 2010-01-20 08:04:35 6

Credit goes to "eightmillion" Show Sample Output

-5

removedir(){ read -p "Delete the current directory $PWD ? " human;if [ "$human" = "yes" ]; then [ -z "${PWD##*/}" ] && { echo "$PWD not set" >&2;return 1;}; rm -Rf ../"${PWD##*/}"/ && cd ..; else echo "I'm watching you" | pv -qL 10; fi; }

oshazard · 2010-01-20 08:01:21 9

Download full FLAC albums from archive.org

The only zipped version of an album available for download is the lossy mp3 version. To download lossless files, because of their size, you must download them individually. This command scrapes the page for all the FLAC (or also SHN) files.
This is sample output - yours may be different.
1

wget -rc -A.flac --tries=5 http://archive.org/the/url/of/the/album

meunierd · 2010-01-20 07:36:25 4
Merge - Concate MP3 files

That way, you can make a mix on the fly with the mp3 files in the current directory to make a bunch mp3 file.
This is sample output - yours may be different.
0

sox *.mp3 -t wavpcm - | lame - > bunch.mp3

sputnick · 2010-01-20 01:27:12 2
renice by name
This is sample output - yours may be different.
4

renice +5 -p $(pidof <process name>)

0x2142 · 2010-01-19 22:16:24 3
transfer files locally to be sure that file permissions are kept correctly showing progress

This may seem like a long command, but it is great for making sure all file permissions are kept in tact. What it is doing is streaming the files in a sub-shell and then untarring them in the target directory. Please note that the -z command should not be used for local files and no perfomance increase will be visible as overhead processing (CPU) will be evident, and will slow down the copy. You also may keep simple with, but you don't have the progress info: cp -rpf /some/directory /other/path Show Sample Output
This is sample output - yours may be different.
```
7MB 0:00:01 [59.7MB/s] [============>        ] 57% ETA 0:00:00
```
-2

dir='path to file'; tar cpf - "$dir" | pv -s $(du -sb "$dir" | awk '{print $1}') | tar xpf - -C /other/path

starchox · 2010-01-19 19:05:45 3
Perl one liner for epoch time conversion

Converts Unix epoch time to localtime. Useful for any logs that only display epoch time. Show Sample Output
This is sample output - yours may be different.
```
perl -pe's/([\d.]+)/localtime $1/e;' /var/nagios/nagios.log

[Tue Jan 19 09:48:00 2010] HOST EVENT HANDLER: winboxen.example.com;(null);(null);(null);notify-host-by-email
```
3

perl -pe's/([\d.]+)/localtime $1/e;'

tuxtutorials · 2010-01-19 18:47:58 3
improve copy file over ssh showing progress

You set the file/dirname transfer variable, in the end point you set the path destination, this command uses pipe view to show progress, compress the file outut and takes account to change the ssh cipher. Support dirnames with spaces. Merged ideas and comments by http://www.commandlinefu.com/commands/view/4379/copy-working-directory-and-compress-it-on-the-fly-while-showing-progress and http://www.commandlinefu.com/commands/view/3177/move-a-lot-of-files-over-ssh Show Sample Output
This is sample output - yours may be different.
```
112MB 0:00:12 [8.78MB/s] [==============>     ] 96%
```
3

file='path to file'; tar -cf - "$file" | pv -s $(du -sb "$file" | awk '{print $1}') | gzip -c | ssh -c blowfish user@host tar -zxf - -C /opt/games

starchox · 2010-01-19 16:02:45 37
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What's this?

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ssh: change directory while connecting

Useful to create an alias that sends you right in the directory you want : alias server-etc="ssh -t server 'cd /etc && $SHELL'"

Stop procrastination on Facebook.com

or echo '127.0.0.1 facebook.com' | sudo tee -a /etc/hosts Do not execute this command if you don't know what you are doing.

Mapreduce style processing

parallel can be installed on your central node and can be used to run a command multiple times. In this example, multiple ssh connections are used to run commands. (-j is the number of jobs to run at the same time). The result can then be piped to commands to perform the "reduce" stage. (sort then uniq in this example). This example assumes "keyless ssh login" has been set up between the central node and all machines in the cluster. bashreduce may also do what you want.

Calculate sum of N numbers (Thanks to flatcap)

replaces "\n" with "+"

Print all 256 colors for testing TERM or for a quick reference

This is super fast and an easy way to test your terminal for 256 color support. Unlike alot of info about changing colors in the terminal, this uses the ncurses termcap/terminfo database to determine the escape codes used to generate the colors for a specific TERM. That means you can switch your terminal and then run this to check the real output. $ tset xterm-256color at any rate that is some super lean code! Here it is in function form to stick in your .bash_profile aa_256 () { ( x=`tput op` y=`printf %$((${COLUMNS}-6))s`; for i in {0..256}; do o=00$i; echo -e ${o:${#o}-3:3} `tput setaf $i;tput setab $i`${y// /=}$x; done ) } From my bash_profile: http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

Disco lights in the terminal

Looks best in an 80x24 256-color terminal emulator.

Expedient hard disk temprature and load cycle stats

This command is a great way to check to see if acpi is doing damage to your disks by agressivly parking the read arm and wearing down it's life. As you can see, mine has lost half its life. I'm sure this could be shortened though somehow. It will use smartctl to dump the stats and then grep out just the temperature and load cycles for the disk (a load cycle is when a the read arm comes out of park and wears on the drive).

Clone or rescue a block device

If you use the logfile feature of ddrescue, the data is rescued very efficiently (only the needed blocks are read). Also you can interrupt the rescue at any time and resume it later at the same point. http://www.gnu.org/software/ddrescue/ddrescue.html

delete multiple files with spaces in filenames (with confirmation)

ls -Q will show the filenames in quotes. xargs -p rm will print all the filenames piped from ls -Q and ask for confirmation before deleting the files. without the -Q switch, if we have spaces in names, then the files won't be deleted.

reverse order of file

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