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Format ps command output

ps command gives the possibility to display information with custom formatting with the -o options followed by the format specifier list. Show Sample Output

ps ax -o "%p %U %u %x %c %n"

servermanaged · 2009-07-14 17:21:59 9

Paste OS X clipboard contents to a file on a remote machine

Redirects the contents of your clipboard through a pipe, to a remote machine via SSH.
This is sample output - yours may be different.
3

pbpaste | ssh user@hostname 'cat > ~/my_new_file.txt'

mikedamage · 2009-07-14 16:32:03 3
Create a tar archive using 7z compression

Using 7z to create archives is OK, but when you use tar, you preserve all file-specific information such as ownership, perms, etc. If that's important to you, this is a better way to do it.
This is sample output - yours may be different.
8

tar cf - /path/to/data | 7z a -si archivename.tar.7z

slashdot · 2009-07-14 14:21:30 7
Blank/erase a DVD-RW
This is sample output - yours may be different.
4

dvd+rw-format -force /dev/dvd1

unixmonkey4640 · 2009-07-14 14:18:33 5
Fast grepping (avoiding UTF overhead)

greps using only ascii, skipping the overhead of matching UTF chars. Some stats: $ export LANG=C; time grep -c Quit /var/log/mysqld.log 7432 real 0m0.191s user 0m0.112s sys 0m0.079s $ export LANG=en_US.UTF-8; time grep -c Quit /var/log/mysqld.log 7432 real 0m13.462s user 0m9.485s sys 0m3.977s Try strace-ing grep with and without LANG=C
This is sample output - yours may be different.
0

export LANG=C; grep string longBigFile.log

ioggstream · 2009-07-14 12:48:02 9
git remove files which have been deleted

I've used technicalpickles command a lot, but this one handles whitespaces in filenames. I'm sure you want to create an alias for it :) Show Sample Output
This is sample output - yours may be different.
```
$ git status
# On branch master
# Changed but not updated:
#   (use "git add/rm <file>..." to update what will be committed)
#
#	deleted:    some file
#	deleted:    some_file
#	deleted:    somefile
#
no changes added to commit (use "git add" and/or "git commit -a")
$ git ls-files -z --deleted | xargs -0 git rm
rm 'some file'
rm 'some_file'
rm 'somefile'
```
7

git ls-files -z --deleted | xargs -0 git rm

blindgaenger · 2009-07-14 08:29:38 5
find all non-html files
This is sample output - yours may be different.
4

find . -type f ! -name "*html"

sharfah · 2009-07-14 07:56:38 3
find external links in all html files in a directory list

Just a handy way to get all the unique links from inside all the html files inside a directory. Can be handy on scripts etc. Show Sample Output
This is sample output - yours may be different.
```
http://fonts.apple.com/TTRefMan/index.html
http://gnuwin32.sourceforge.net/packages/ttf2pt1.htm
http://heliotrope.homestead.com/files/printsoft.html
http://linuxartist.org/fonts/
```
4

find . -name '*.html' -print0| xargs -0 -L1 cat |sed "s/[\"\<\>' \t;]/\n/g" |grep "http://" |sort -u

jamespitt · 2009-07-14 07:00:15 10
Get a range of SVN revisions from svn diff and tar gz them

Handy when you need to create a list of files to be updated when subversion is not available on the remote host. You can take this tar file, and upload and extract it where you need it. Replace M and N with the revisions specific to yours. Make sure you do this from an updated (svn up) working directory.
This is sample output - yours may be different.
2

tar cvfz changes.tar.gz --exclude-vcs `svn diff -rM:N --summarize . | grep . | awk '{print $2}' | grep -E -v '^\.$'`

jaysee · 2009-07-13 19:39:10 12
Search through files, ignoring .svn
This is sample output - yours may be different.
2

grep <pattern> -R . --exclude-dir='.svn'

log0 · 2009-07-13 19:08:53 6
Find files with lines that do not match a pattern

This one would be much faster, as it's only one executed command.
This is sample output - yours may be different.
1

fmiss() { grep -RL "$*" * }

inkel · 2009-07-13 18:30:54 5
Watch number of lines being processed on a clear screen

awk can clear the screen while displaying output. This is a handy way of seeing how many lines a tail -f has hit or see how many files find has found. On solaris, you may have to use 'nawk' and your machine needs 'tput' Show Sample Output
This is sample output - yours may be different.
```
13164
```
0

cat /dev/urandom|awk 'BEGIN{"tput cuu1" | getline CursorUp; "tput clear" | getline Clear; printf Clear}{num+=1;printf CursorUp; print num}'

axelabs · 2009-07-13 07:30:51 5
unzip all .zip files in /example/directory

Simple but useful little command to unzip all files in a directory.
This is sample output - yours may be different.
-5

cd /example/directory && unzip \*.zip

Paaskehare · 2009-07-12 21:45:13 6
Sorting by rows

Save the script as: sort_file Usage: sort_file < sort_me.csv > out_file.csv This script was originally posted by Admiral Beotch in LinuxQuestions.org on the Linux-Software forum. I modified this script to make it more portable. Show Sample Output
This is sample output - yours may be different.
```
Sort values arranged in rows, like:
x3, x5, x1, x4, x7, x2, x6
x11, x13, x14, x8, x10, x12, x9
... ... ... ... ... ... ...
After executing the script, values will be horizontally sorted:
x1, x2, x3, x4, x5, x6, x7
x8, x9, x10, x11, x12, x13, x14
... ... ... ... ... ... ...
where x1, x2, ..., xn are integers
Each row can have n integers and 
x1 < x2 < x3, ..., < x7
x8 < x9 < x10, ..., < x14
..   ..   ..           ..
After executing the script, each row will be sorted in ascending order.
```
0

infile=$1 for i in $(cat $infile) do echo $i | tr "," "\n" | sort -n | tr "\n" "," | sed "s/,$//" echo done

iframe · 2009-07-12 21:23:37 6
Using the urxvt terminal daemon

- for .xsession use - Advantages of running a urxvt daemon include faster creation time for terminal windows and a lot of saved memory. You can start new terminals as childs of urxvtd by typing urxvtc. Another advantage is, that background jobs are always owned by the urxvtd and will survive as long the daemon is running.
This is sample output - yours may be different.
4

urxvtd -q -o -f

wattafunnyname · 2009-07-12 14:09:06 3
find out which directories in /home have the most files currently open
This is sample output - yours may be different.
2

lsof |awk ' {if ( $0 ~ /home/) print substr($0, index($0,"/home") ) }'|cut -d / -f 1-4|sort|uniq -c|sort -bgr

lucainvernizzi · 2009-07-12 02:25:57 3
Test if the given argument is a valid ip address.

This command will output 1 if the given argument is a valid ip address and 0 if it is not. Show Sample Output
This is sample output - yours may be different.
```
1
```
0

perl -e '$p=qr!(?:0|1\d{0,2}|2(?:[0-4]\d?|5[0-5]?|[6-9])?|[3-9]\d?)!;print((shift=~m/^$p\.$p\.$p\.$p$/)?1:0);' 123.123.123.123

speaker · 2009-07-12 00:24:29 3
Outputs files with ascii art in the intended form.

Files containing ascii art (e.g. with .nfo extension) are typically not correctly reproduced at the command line when using cat. With iconv one can easily write a wrapper to solve this: #!/bin/bash if [ -z "$@" ]; then echo "Usage: $(basename $0) file [file] ..." else iconv -f437 -tutf8 "$@"; fi exit 0
This is sample output - yours may be different.
9

iconv -f437 -tutf8 asciiart.nfo

speaker · 2009-07-11 23:50:05 8
Hear the mice moving

Beeps on mouse's every move. Bear in mind that, at least on Ubuntu, /dev/input/mice can be read only by root.
This is sample output - yours may be different.
4

while true; do beep -l66 -f`head -c2 /dev/input/mice|hexdump -d|awk 'NR==1{print $2%10000}'`; done

5z474n · 2009-07-11 12:01:27 22
Use xdg-open to avoid hard coding browser commands

I rarely use the system menu to start applications. I use keyboard shortcuts instead. Keyboard shortcuts are convenient time savers. To configure the shortcuts I use gconf-editor or CompizConfig Settings Manager (if I have Compiz turned on). Lately I've been using Chromium as my browser. Since Chromium is under heavy development it occasionally becomes unusable and I have to switch back to Firefox. I was hard-coding the browser command in my keyboard shortcuts. This became problematic with frequent browser hopping. I now use the xdg-open command when defining my keyboard shortcuts. xdg-open opens a file or URL in the user's preferred application. In the metacity keybinging_commands I have xdg-open http://gmail.com where I used to have firefox http://gmail.com. Now when switching browsers I don't have to update each keyboard binding command I just change my default browser in Ubuntu by clicking through the menu: System / Preferences / Preferred Applications / Web Browser. xdg-open is more convenient for this browser hopper.
This is sample output - yours may be different.
8

xdg-open http://gmail.com

PLA · 2009-07-11 11:48:32 10
kill some process (same as others) but parsing to a variable
This is sample output - yours may be different.
-4

tokill=`ps -fea|grep process|awk '{ printf $2" "}'`; kill -9 $tokill;

jhansen · 2009-07-11 01:40:29 7
Beep siren

Infinitely plays beeps with sinusoidally changing sound frequency. Ideal for alarm on an event.
This is sample output - yours may be different.
1

tempo=33; slope=10; maxfreq=888; function sinus { echo "s($1/$slope)*$maxfreq"|bc -l|tr -d '-'; }; for((i=1;;i++)); do beep -l$tempo -f`sinus $i`; done

5z474n · 2009-07-10 21:24:11 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
Use Cygwin to talk to the Windows clipboard

I spent a bunch of time yesterday looking for the xsel package in Cygwin- turns out you can use the /dev/clipboard device to do the same thing. Show Sample Output
This is sample output - yours may be different.
```
$ ls        
$ touch testfile
$ ls
testfile
$ ls > /dev/clipboard
$ cat /dev/clipboard
testfile
```
13

cat /dev/clipboard; $(somecommand) > /dev/clipboard

sud0er · 2009-07-10 18:48:21 5
write text or append to a file

If you just want to write or append some text to a file without having to run a text editor, run this command. After running the command, start typing away. To exit, type . on a line by itself. Replacing the >> with a single > will let you overwrite your file. Show Sample Output
This is sample output - yours may be different.
```
> here is a line
> here is another line
> .
```
4

cat <<.>> somefilename

tomlouie · 2009-07-10 17:45:42 11
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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" }

Create QR codes from a URL.

like 7300, but doesn't clutter your working directory with old qr.*.png files. This will get the QR barcode, and send it right into ImageMagick's 'display' tool. Usage is the same as 7300; just call this function followed by the URL: $ qrurl http://xkcd.com

Get the size of all the directories in current directory

View and review the system process tree.

The "pstree" command uses special line-drawing characters. However, when piped into the "less" pager, these are normally disabled.

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Give all those pictures the same name format, trailing zeros please for the right order, offset to merge different collections of pictures

When you have different digital cameras, different people, friends and you want to merge all those pictures together, then you get files with same names or files with 3 and 4 digit numbers etc. The result is a mess if you copy it together into one directory. But if you can add an offset to the picture number and set the number of leading zeros in the file name's number then you can manage. OFFS != 0 and LZ the same as the files currently have is not supported. Or left as an exercise, hoho ;) I love NF="${NF/#+(0)/}",it looks like a magic bash spell.

Screencast with ffmpeg x11grab

requires ffmpeg & xwininfo to be installed replace hw:0,0 with pulse if you like using pulseaudio press q to quit

List the Sizes of Folders and Directories

I wanted an easy way to list out the sizes of directories and all of the contents of those directories recursively.

How to secure delete a file

Instead, install apt-get install secure-delete and you can use: -- srm to delete file and directory on hard disk -- smem to delete file in RAM -- sfill to delete "free space" on hard disk -- sswap to delete all data from swap

Exclude inserting a table from a sql import

Starting with a large MySQL dump file (*.sql) remove any lines that have inserts for the specified table. Sometimes one or two tables are very large and uneeded, eg. log tables. To exclude multiple tables you can get fancy with sed, or just run the command again on subsequently generated files.

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