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Batch remove protection from all pdf files in a directory

Replace YOURPASSWORDHERE with the pdf password. [qpdf needed]
This is sample output - yours may be different.
-1

mkdir -p temp && for f in *.pdf ; do qpdf --password=YOURPASSWORDHERE --decrypt "$f" "temp/$f"; done && mv temp/* . && rm -rf temp

bufferoverflow · 2013-06-25 18:41:51 11
Command to find filesystem type

C:/Sys/Bin/Admin/Desktop/Brackets/Search.exe Show Sample Output
This is sample output - yours may be different.
```
brackets
```
-1

#11671

gchicareli · 2012-12-22 16:09:08 4
Display two calendar months side by side
This is sample output - yours may be different.
-1

cal -n 2 8 2018

actionless · 2018-09-04 13:31:03 326
find all references to a server in web.config files with powershell

Finds all files of a certain name and reports all line with the string. Very simple. Show Sample Output
This is sample output - yours may be different.
```
(80) C:\P\OS.svn -? ls \\webserver\c\inetpub\wwwroot -i web.config -r | Select-String "db-server"

\\webserver\c\inetpub\wwwroot\SomeApp\Web.config:72:    <add nam
e="foo" connectionString="Server=db-server;Database=foo;Integrated Security=true"/>
\\webserver\c\inetpub\wwwroot\SomeApp\Web.config:74:    <add nam
e="bar" connectionString="Server=db-server;Database=bar;Integrated Security=true"/>
```
-1

ls \\someserver\c$\inetpub\wwwroot -r -i web.config | Select-String "SomeMachineName"

cbilson · 2009-03-25 22:36:58 8
Read just the IP address of a device

another way to output the IP address' of the system
This is sample output - yours may be different.
-1

/sbin/ifconfig | grep inet | cut -f 2 -d ":" | cut -f 1 -d " "

random_bob · 2009-07-21 21:42:04 10
Python Challenge Problem 0

This is the answer to the 0th problem from the python challenge < http://www.pythonchallenge.com/ >. Replace sensible-browser with firefox, w3m or whatever. Show Sample Output
This is sample output - yours may be different.
```
http://www.pythonchallenge.com/pc/def/map.html
```
-1

sensible-browser http://www.pythonchallenge.com/pc/def/$(bc <<< 2^38).html

kzh · 2010-02-02 00:53:18 8
Console clock
This is sample output - yours may be different.
-1

watch -n1 echo

rubenmoran · 2011-02-10 08:55:09 8
Repeat a portrait eight times so it can be cut out from a 6

Yes, You could do it in the GIMP or even use Inkscape, but the command line is so much easier. This is a new version of a previous command fixing some things complained about.
This is sample output - yours may be different.
-1

montage input.jpg -auto-orient -duplicate 7 -geometry 500 -frame 5 output.jpg

anthony · 2011-06-09 14:03:01 3
shopt
This is sample output - yours may be different.
-1

help shopt

ankush108 · 2012-06-26 17:25:38 19
Install dpkg packages
This is sample output - yours may be different.
-1

sudo dpkg -i *.deb

newnumber · 2017-06-20 11:45:35 16
kill all processes of a program

kill all processes of a program
This is sample output - yours may be different.
-1

kill -9 $(pidof *program*)

salazar · 2009-02-13 18:56:58 10
Count emails in an MBOX file
This is sample output - yours may be different.
-1

grep -c '^From ' mbox_file

drewk · 2009-11-07 03:31:05 4
Add a line to crontab using sed

I needed to add a line to my crontab from within a script and didn't want to have to write my own temporary file. You may find you need to reload the crond after this to make the change take effect. e.g.: if [ -x /sbin/service ] then /sbin/service crond reload else CRON_PID=`ps -furoot | awk '/[^a-z]cron(d)?$/{print $2}'` if [ -n "$CRON_PID" ] then kill -HUP $CRON_PID fi fi The reason I had CRON_HOUR and CRON_MINS instead of numbers is that I wanted to generate a random time between midnight & 6AM to run the job, which I did with: CRON_HOUR=`/usr/bin/perl -e 'printf "%02d\n", int(rand(6))'` CRON_MINS=`/usr/bin/perl -e 'printf "%02d\n", int(rand(60));'`
This is sample output - yours may be different.
-1

crontab -l | sed -e '$G;$s-$-'"$CRON_MINS $CRON_HOUR"' * * * /usr/bin/command >/dev/null 2>&1-' | crontab -

JohnGH · 2010-01-07 11:00:05 6
draw 45deg rotated text at the center of image
This is sample output - yours may be different.
-1

convert input.png -pointsize 32 -gravity center -annotate 45 "hello, world" output.png

kev · 2011-08-26 06:49:25 5
quick find executable from locate db

This command allow you quick find any executable by keyword(s) in your system. NOTE: Sometime this command will output like this: `hello.py.launch': No such file or directory this is normal behaviour Show Sample Output
This is sample output - yours may be different.
```
/usr/bin/hello
/usr/lib/tk8.5/demos/hello
```
-1

find $(locate hello) -type f -executable -print|grep -E "hello\$"

unixmonkey14859 · 2012-08-18 07:51:53 5
Battery Health
This is sample output - yours may be different.
-1

upower -i /org/freedesktop/UPower/devices/battery_BAT0

newnumber · 2017-06-20 11:50:59 35
Show all video files in the current directory (and sub-dirs)
This is sample output - yours may be different.
-1

find -type f -printf '%P\000' | egrep -iz '\.(avi|mpg|mov|flv|wmv|asf|mpeg|m4v|divx|mp4|mkv)$' | sort -z | xargs -0 ls -1

udim · 2009-04-19 19:45:11 23
Read just the IP address of a device

to clean up the extra lines Show Sample Output
This is sample output - yours may be different.
```
127.0.0.1
192.168.1.127
```
-1

/sbin/ifconfig | grep inet | cut -f 2 -d ":" | cut -f 1 -d " " |egrep -v "^$"

giray · 2009-07-22 07:27:54 3
ping scan for a network and says who is alive or not
This is sample output - yours may be different.
-1

for i in `seq 254`;do ping -c 1 192.168.10.$i > /dev/null && echo "$i is up"||echo "$i is down";done

hackuracy · 2011-08-26 11:09:43 3
Get windows IPv4 and nothing else
This is sample output - yours may be different.
-1

cls && ipconfig | findstr -R "[ IPv4 | adapter ]"

sameer666 · 2013-12-03 13:29:30 5
make a zip file containing all files with the openmeta tag "data"

finding all files with the metadata tag "data" using the metadata find command mdfind , writing the list to a temporary file, reading the input for the .zip file from this temporary file.
This is sample output - yours may be different.
-1

mdfind "tag:data" > /tmp/data.txt ; zip -r9@ ~/Desktop/data.zip < /tmp/data.txt

vranx · 2009-02-24 14:49:50 6
Check if variable is a number
This is sample output - yours may be different.
-1

echo $X | egrep "^[0-9]+$"

sharfah · 2009-10-09 13:59:47 6
Indent all the files in a project using indent

This version uses the indent C formatting utility. Doesn't appear to be included with ubuntu. But CentOS and MacOS have it.
This is sample output - yours may be different.
-1

find . -iname \*.[ch] -exec indent "{}" \;

putnamhill · 2010-09-10 13:25:10 4
Function that swaps the filenames of two given files.

(Changed to "bartonskis" suggestion.)
This is sample output - yours may be different.
-1

flipf(){ if [ -f "$1" -a -f "$2" ]; then mv "$1" "$1.$$" && mv "$2" "$1" && mv "$1.$$" "$2" || echo "$!"; else echo "Missing a file: $!"; fi; }

Void42 · 2010-12-16 10:38:28 7
Replace Space In Filenames With Underscore

@ http://sgowtham.net/blog/2007/10/18/bash-replace-space-in-filenames-with-underscore/
This is sample output - yours may be different.
-1

for file in "* *"; do mv "${file}" "${file// /_}"; done

evandrix · 2012-04-25 00:02:35 7
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ls not pattern

I've been looking for a way to do this for a while, get a not pattern for shell globs. This works, I'm using to grab logs from a remote server via scp.

Convert control codes to visible Unicode Control Pictures

Converts control codes and spaces (ASCII code ≤ 32) to visible Unicode Control Pictures, U+2400 ? U+2420. Skips \n characters, which is probably a good thing.

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" }

Print all the lines between 10 and 20 of a file

Subtly different to the -n+p method... and probably wrong in so many ways....... But it's shorter. Just.

Install pip with Proxy

Installs pip packages defining a proxy

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"

How to estimate the storage size of all files not named *.[extension] on the current directory

With this sentence we can estimate the storage size of all files not named *.jpg on the current directory. The syntax is based on Linux, for Unix compliance use: find ./* -prune ! -name '*.jpg' -ls |awk '{TOTAL+=$7} END {print int(TOTAL/(1024^2))"MB"}' We can change the jpg extension for whatever extension what we need

Create a large test file (taking no space).

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"

Create a new file

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