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unix2dos with awk
This is sample output - yours may be different.
0

awk 'sub("$", "\r")' unixfile.txt > winfile.txt

pedalinux · 2011-06-10 15:20:01 3
Clean a wordlist for use with password cracking tools and rules

Using large wordlists is cumbersome. Using password cracking programs with rules such as Hashcat or John the ripper is much more effective. In order to do this many times we need to "clean" a wordlist removing all numbers, special characters, spaces, whitespace and other garbage. This command will covert a entire wordlist to all lowercase with no garbage.
This is sample output - yours may be different.
0

cat dirtyfile.txt | awk '{gsub(/[[:punct:]]/,"")}1' | tr A-Z a-z | sed 's/[0-9]*//g' | sed -e 's/ //g' | strings | tr -cs '[:alpha:]' '\ ' | sed -e 's/ /\n/g' | tr A-Z a-z | sort -u > cleanfile.txt

purehate · 2011-08-28 01:26:04 10
Modify all files newer than another file and touch them to a specific date.

Modify all files newer than another file and touch them to a specific date. Show Sample Output
This is sample output - yours may be different.
```
None.  Check it with 'ls -al'
```
0

find . -newer /tmp/foo -exec touch --date "2011-12-12" {} \;

djangofan · 2011-12-15 04:55:57 3
find all c and cpp files except the ones in the unit-test and android subdirectories

Find files matching multiple descriptions (*.c and *.cpp) excluding multiple directories (unit-test and android).
This is sample output - yours may be different.
0

find . ! -regex '.*/$unit-test\|android$/.*' $ -name '*.c' -o -name '*.cpp' $

flatcap · 2012-04-26 17:53:45 3
Select columns in a file

Display the 1st field (employee name) from a colon delimited file Show Sample Output
This is sample output - yours may be different.
```
Emma Thomas
Alex Jason
Madison Randy
Sanjay Gupta
Nisha Singh
```
0

cut -d: -f 1 names.txt

ankush108 · 2012-06-26 19:28:25 3
Fill a hard drive with ones - like zero-fill, but the opposite :)
This is sample output - yours may be different.
0

perl -e '$s="$s\xFF" while length($s)<512; print $s while 1' | dd of=/dev/sdX

stonefoz · 2012-08-20 05:33:28 4
Runs previous command replacing foo by bar every time that foo appears

this also can !
This is sample output - yours may be different.
0

^bar^foo^

datamining · 2013-04-22 03:47:07 5
remove duplicate with change order
This is sample output - yours may be different.
0

perl -lne 'print unless $seen{$_}++'

kotokz · 2013-07-01 03:47:48 7
Temporarily suspend and unsuspend a foreground job

Like this you can continue a suspended job without blocking again your terminal
This is sample output - yours may be different.
0

^Z <...> % &

Dev_NIX · 2014-06-13 15:35:52 7
Git branches I checked-out on a specific date

Replace "Oct 2" in the first grep pattern to be the date to view branch work from Show Sample Output
This is sample output - yours may be different.
```
my_new_feature
my_second_new_feature
master
```
0

git reflog --date=local | grep "Oct 2 .* checkout: moving from .* to" | grep -o "[a-zA-Z0-9\-]*$" | sort | uniq

Trindaz · 2014-10-03 15:12:22 8
Fix Chromium browser not starting

If AppArmor is installed with all profiles enforced, Chromium may refuse to start, printing a "failed to launch zygote process" error on stderr. This command switches the Chromium profile from enforce to complain mode, effectively un-sandboxing the browser, but depending on the system setup it may be a smaller deal than a nonfunctional application. Show Sample Output
This is sample output - yours may be different.
```
Setting /etc/apparmor.d/usr.bin.chromium-browser to complain mode.
```
0

sudo aa-complain /etc/apparmor.d/usr.bin.chromium-browser

lordtoran · 2015-09-30 18:56:28 13
Random Wallpaper From Reddit
This is sample output - yours may be different.
0

wget -O - http://www.reddit.com/r/wallpaper | grep -Eo 'http://i.imgur.com[^&]+jpg' | shuf -n 1 | xargs wget -O background.jpg ; feh --bg-fill background.jpg

lowrez · 2015-12-22 19:11:02 21
sha256 checksum for Chef's remote_file resource
This is sample output - yours may be different.
0

curl -L -s https://some.file | shasum -a 256 | cut -c-12

Raboo · 2017-04-04 13:07:24 16
Replace string and ask for confirmation
This is sample output - yours may be different.
0

:%s/foo/bar/gc

tofu00 · 2017-11-29 10:10:27 20
search manpages on the internets

manview searches man pages on the internets in case the man command doesn't work for some reason or if you think the man pages in Cornell's flavor of Solaris might differ from yours. It dumps the manpage info from lynx to less, so it ends up looking remarkably like a real manpage. Put it in your .bash_profile or .bashrc, and then you can use it like a regular command: typing "manview ssh" will give you the manpage for ssh.
This is sample output - yours may be different.
0

manview() { lynx -dump -accept_all_cookies 'http://www.csuglab.cornell.edu/cgi-bin/adm/man.cgi?section=all&topic='"$1" | less; }

Ben · 2009-03-11 19:02:11 7
Prints line numbers
This is sample output - yours may be different.
0

awk '{print NR,$0}'

4Aiur · 2010-01-08 08:00:34 3
Display the space used for all your mounted logical volume (LV)
This is sample output - yours may be different.
0

df -kh /dev/vg0*/lv*

marousan · 2010-02-03 13:37:30 4
Open Remote Desktop (RDP) from command line having a custom screen size

The above command will: - open a Remote Desktop connection to [servername / IP Address], - authenticate using [username] and [password], - configure resolution to best fit your desktop (I have a 1366x768px resolution so I left space for 2 panels of 22px each), - sets the color depth for the connection to 16 bpp, - hides the window manager decorations, - enables compression of the RDP data stream, - enables persistent bitmap caching.
This is sample output - yours may be different.
0

rdesktop -u <username> -p <password> -g 1366x724 -a 16 -D -z -P <servername / IP Address>

mariusbutuc · 2010-06-09 11:47:35 3
How to Kill Process that is Running on Certain Port in Windows?

I cannot run Tomcat from Eclipse. It says that there?s other process that is running on port 8080, but I don?t know what is the process, and how to stop it from the Services manger in Windows. So here?s how you can kill and find out what is that process: To find out what PID 8080 was (hopefully not a trojan) I typed tasklist /FI ?PID eq 8080″ taskkill /F /PID 2600
This is sample output - yours may be different.
0

netstat -a -o -n | grep 8080

evandrix · 2011-04-28 09:58:59 3
Watch Weather Channel live video stream without a browser

Perfect for following Hurricane Irene
This is sample output - yours may be different.
0

vlc mms://twcilivewm.fplive.net/twcilive-live/twci_350

andresmh · 2011-08-28 02:24:53 3
Get the name or user running the process of specified PID

Gets the current system user running a process with the specified pid Show Sample Output
This is sample output - yours may be different.
```
nssy@yoda:~$ ps aux | grep 3698 | grep -v 'grep' | awk '{ print $1 }'
nssy
```
0

ps aux | grep PID | grep -v 'grep' | awk '{ print $1 }'

nssy · 2011-11-05 04:53:29 3
Stop iptables completely

If you changed the default policy on any chain other than filter table chain's, this won't be enough.
This is sample output - yours may be different.
0

iptables -P INPUT ACCEPT; iptables -P FORWARD ACCEPT; iptables -P OUTPUT ACCEPT; for table in `cat /proc/net/ip_tables_names`; do iptables -t $table -F; iptables -t $table -Z; iptables -t $table -X; done

dash · 2011-12-15 18:19:34 42
Squeeze repeats

Convert long list of ' ' to a single space. Compress space and other characters. Show Sample Output
This is sample output - yours may be different.
```
->xyz           wof
->xyz wof
```
0

tr -s ' '

ankush108 · 2012-06-26 19:34:18 8
Download all images from a 4chan thread

Couldn't make the other work so I made this
This is sample output - yours may be different.
0

curl -s http://boards.4chan.org/---/res/nnnnnn | grep -o -i 'File: <a href="//images.4chan.org\/[a-z]*\/src\/[0-9]*\.[a-z]\{3\}' | sed -r 's/File: <a href="\/\///' |xargs wget

MonsieurMachin · 2012-08-21 07:25:20 5
Easily find an old command you run

this also can find the old command you used before
This is sample output - yours may be different.
0

history | tail -100 | grep cmd

datamining · 2013-04-22 03:49:43 9
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Merge several pdf files into a single file

ssh batch jobs: query hundreds of hosts with an ssh command

Need to query hundreds of hosts with an ssh command ? Of course you'll have setup keys on all your remote HOSTs. But in the case a key is not present this command will skip that node, proceeding on to the next. -t: Force pseudo-tty allocation. This can be used to execute arbitrary screen-based programs on a remote machine. Also prevents unwanted stty messages being sent to console -q: Quiet mode. -o "BatchMode yes" If set to yes, passphrase/password querying will be disabled. This option is useful in scripts and other batch jobs where no user is present

awk change field separator

GNU Awk 3.1.4

commentate specified line of a file

used when modify several configuration files with a single command

Look up the definition of a word

A bash function might also be useful: $ dict() { curl dict://dict.org/d:$1; } Or if you want less verbose output: $ dict() { curl -s dict://dict.org/d:$1 | perl -ne 's/\r//; last if /^\.$/; print if /^151/../^250/'; }

Find dead symbolic links

-L tells find to follow symbolic links, so -type l will only return links it can't follow (i.e., those that are broken).

Create an audio test CD of sine waves from 1 to 99 Hz

This command creates and burns a gapless audio CD with 99 tracks. Each track is a 30 second sine wave, the first is 1 Hz, the second 2 Hz, and so on, up to 99 Hz. This is useful for testing audio systems (how low can your bass go?) and for creating the constant vibrations needed to make non-Newtonian fluids (like cornstarch and water) crawl around. Note, this temporarily creates 500MB of .cdda files in the current directory. If you don't use the "rm" at the end of the command, you can burn more disks using $ cdrdao write cdrdao.toc Prerequisites: a blank CD-R in /dev/cdrw, sox (http://sox.sourceforge.net/), and cdrdao (http://cdrdao.sourceforge.net/). I'm also assuming a recent version of bash for the brace expansion (which just looks nicer than using seq(1), but isn't necessary).

Display a wave pattern

Purely frivolous - print a sine/cosine curve to the console - the width varies as it progresses. Ctrl-C to halt.

LIst svn commits by user for a date range

Outputs a quick summary of the svn commits for a user over a date range with the detail revision logs including comments and files affected. Useful for searching for a particular change or reporting by user.

Compute the average number of KB per file for each dir

Shorter version using --tag

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