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Say no to overwriting if cp -i is the default alias.

If the problem is an aliased synonym for a command, you can still execute the original command by pre-pending it with a reverse-slash '\'. This works at least in Bash, but I guess the aliasing system refers definitely to Bash (and not only).
This is sample output - yours may be different.
0

\cp something toSomeWhereElse

xakon · 2010-09-25 03:07:04 9
Kill all Zombie processes if they accept it!

just a leaner, smaller version. Love the original idea!
This is sample output - yours may be different.
0

kill -9 `ps xawo state=,pid=|sed -n 's/Z //p'`

AskApache · 2010-10-27 07:38:07 3
# Multiline unique paragraph sort; with case insensitive option (-i)

Sorts blank line delimited paragraphs. '-i' -- case insensitivity option -- removes redundant paragraphs in a case insensitive way, and then sorts in a case insensitive way. If you search CommandLineFu with multiple anded terms searches, redundancy can ensue. This sorts the retrieved text (among other kinds of data), and removes the redundancy. Show Sample Output
This is sample output - yours may be different.
```
# Backup all MySQL Databases to individual files
for I in $(mysql -e 'show databases' -s --skip-column-names); do mysqldump $I | gzip > "$I.sql.gz"; done

# backup local MySQL database into a folder and removes older then 5 days backups
mysqldump -uUSERNAME -pPASSWORD database | gzip > /path/to/db/files/db-backup-`date +%Y-%m-%d`.sql.gz ;find /path/to/db/files/* -mtime +5 -exec rm {} \;

# geoip information
curl -s "http://www.geody.com/geoip.php?ip=$(curl -s icanhazip.com)" | sed '/^IP:/!d;s/<[^>][^>]*>//g'

# List files contained within a zip archive
unzip -l <filename>
```
0

gawk 'BEGIN {RS="\n\n"; if (ARGV[1]=="-i")IGNORECASE=1;ARGC=1}{if (IGNORECASE)Text[tolower($0)]=$0;else Text[$0]=$0 };END {N=asort(Text);for(i=1;i<=N;i++)printf "%s\n\n",Text[i]}' -i<Test.txt

IF_Rock · 2011-05-11 01:03:30 3
A list of IPs (only) that are online in a specific subnet.

Often you want to nmap a list of IPs using the -iL flag. This is an easy way to generate a list of IPs that are online in a specific subnet or IP range (192.168.1.100-110). Show Sample Output
This is sample output - yours may be different.
```
192.168.1.1
192.168.1.43
192.168.1.67
192.168.1.100
192.168.1.101
192.168.1.104
```
0

nmap -sP 192.168.1.0/24 | awk "/^Host/"'{ print $3 }' |nawk -F'[()]' '{print $2}'

cantormath · 2011-12-31 15:50:22 3
Append the line # -*- coding: utf-8 -*- to a file

Useful when specifying char encoding for Python and/or your editor
This is sample output - yours may be different.
0

sed -i -e '1i \# -*- coding: utf-8 -*-' yourfile.py

igniteflow · 2012-05-15 14:54:06 3
Get the IP address
This is sample output - yours may be different.
0

ip a s eth0 | awk '/inet / {print $2} | sed -e 's/\/..//g'

ilovespam · 2012-07-18 02:43:15 3
Play a random avi file in the current directory tree
This is sample output - yours may be different.
0

mplayer $(find . -iname '*.avi' | shuf -n1)

fooacad · 2012-11-13 09:00:12 4
Print first pages from all files from a directory

Very usefull script to use when uoy must print all files from a directory. Show Sample Output
This is sample output - yours may be different.
```
request id is hp-27 (129 file(s))
```
0

lp -dhp -P1-1 -o media=a4 *

alphabraga · 2013-07-26 00:09:56 6
strips ogg audio from webm video ( no reencoding )

Strips the audio track from a webm video. Use this in combination with clive or youtube-dl.
This is sample output - yours may be different.
0

for file in "$@"; do name=$(basename "$file" .webm) echo ffmpeg -i $file -vn -c:a copy $name.ogg ffmpeg -i "$file" -vn -c:a copy "$name.ogg" done

hoodie · 2013-10-05 14:49:07 9
Force Git to overwrite local files after fetch

git fetch --all git reset --hard origin/staging
This is sample output - yours may be different.
0

git reset --hard origin/master

nomikos · 2014-11-06 01:59:04 8
Recursively find files over a certain size and list in descending size order
This is sample output - yours may be different.
0

find . -size +10M -type f -print0 | xargs -0 ls -Sshl1

bradym · 2015-02-26 20:23:26 8
Rotate images and adjust timestamps by +1 hour

works for Powershot SD780 IS
This is sample output - yours may be different.
0

jhead -autorot -ta+1 *

yoyoyojomo · 2015-06-26 05:11:30 10
Get video information with ffmpeg

ffprobe doesn't throw an error and was actually made to do exactly that. Usually ffprobe is located in the same folder as ffmpeg. https://ffmpeg.org/ffprobe.html#Description
This is sample output - yours may be different.
0

ffprobe -i filename.flv

Yamy · 2016-10-15 20:26:34 17
hardcode dnsserver, no more rewriting of etc/resolv.conf

man NetworkManager.conf ... none: NetworkManager will not modify resolv.conf. This implies rc-manager unmanaged Show Sample Output
This is sample output - yours may be different.
```
[main]
dns=none
#plugins=ifcfg-rh,ibft
```
0

f="/etc/NetworkManager/NetworkManager.conf"; if ! grep ^dns $f > /dev/null; then sudo sed -i.bkp '/\[main\]/a dns=none' $f; fi

ksvnix · 2018-05-15 18:17:49 195
download and install the software package in one step
This is sample output - yours may be different.
0

rpm -ivh 'http://www.website.com/path/to/desired_software_package.rpm'

userevolution · 2009-08-17 05:08:58 7
See if your mac can run 64-bit && if it the kernel is loaded 64-bit
This is sample output - yours may be different.
0

ioreg -l -p IODeviceTree | grep -o EFI[0-9]. && system_profiler SPSoftwareDataType |grep 64

commandlinefu · 2009-09-03 19:58:44 3
Show which include directories your installation of Perl is using.

This will show where your Perl installation is looking for modules.
This is sample output - yours may be different.
0

perl -le 'print join $/, @INC'

chuckr · 2009-09-22 22:18:35 6
Do you really believe on Battery Remaining Time? Confirm it from time to time!

Fully recharge your computer battery and start this script. It will create or clean the file named battery.txt, print a start on it and every minute it will append a time stamp to it. Batteries last few hours, and each hour will have 60 lines of time stamping. Really good for assuring the system was tested in real life with no surprises. The last time stamp inside the battery.txt file is of interest. It is the time the computer went off, as the battery was dead! Turn on your computer after that, on AC power of course, and open battery.txt. Read the first and last time stamps and now you really know if you can trust your computer sensors. If you want a simple line of text inside the battery.txt file, use this: watch -n 60 'date > battery.txt' The time of death will be printed inside Show Sample Output
This is sample output - yours may be different.
```
I made a 10s interval to printout quicky this output. For pratical purposes and less file size, 60s interval sounds enought. Here's the contents of battery.txt:

start  
Dom Out 18 03:36:33 BRST 2009
Dom Out 18 03:36:43 BRST 2009
Dom Out 18 03:36:53 BRST 2009
Dom Out 18 03:37:03 BRST 2009
Dom Out 18 03:37:13 BRST 2009
Dom Out 18 03:37:23 BRST 2009
Dom Out 18 03:37:33 BRST 2009
Dom Out 18 03:37:43 BRST 2009
Dom Out 18 03:37:53 BRST 2009
Dom Out 18 03:38:03 BRST 2009
Dom Out 18 03:38:13 BRST 2009
Dom Out 18 03:38:23 BRST 2009
Dom Out 18 03:38:33 BRST 2009
Dom Out 18 03:38:44 BRST 2009
Dom Out 18 03:38:54 BRST 2009
Dom Out 18 03:39:04 BRST 2009

# the last time stamp inside the battery.txt file is of interest. It is the time the computer went off, as the battery was dead! 
```
0

echo start > battery.txt; watch -n 60 'date >> battery.txt'

m33600 · 2009-10-18 07:00:26 4
Set status in pidgin
This is sample output - yours may be different.
0

purple-remote "setstatus?status=Available&message=Checking libpurple"

spsneo · 2010-01-17 23:48:17 4
Get URLs matching some xmms2 search
This is sample output - yours may be different.
0

xmms2 info $(xmms2 mlib search '<query>' | sed -ne 's/^00*$[1-9][0-9]*$.*$/\1/p') | awk -F' = ' '$1~/ url$/{print$2}'

mwgamera · 2010-02-15 10:24:15 3
Kill process by searching something from 'ps' command

Using -f treats the process name as a pattern so you don't have to include the full path in the command. Thus 'pkill -f firefox' works, even with iceweasel.
This is sample output - yours may be different.
0

pkill -f <process name>

eikenberry · 2010-06-19 02:36:31 3
Change directory by inode

First use ls -i to list files and directories with their inode number Then if you want to change to one of the directories, replace inode_no with its inode then execute the command Show Sample Output
This is sample output - yours may be different.
```
 
```
0

cd $(find -inum inode_no)

emacs · 2010-09-25 06:04:32 6
Append a new line "FOOBAR" in all files matching the glob*
This is sample output - yours may be different.
0

sed -i '$a\FOOBAR' *

sputnick · 2011-11-19 03:45:36 3
pdfcount: get number of pages in a PDF file
This is sample output - yours may be different.
0

pdftk file.pdf dump_data output | grep -i Num

evandrix · 2012-03-27 22:48:40 4
Get the IP address
This is sample output - yours may be different.
0

ip a s eth0 | awk -F"[/ ]+" '/inet / {print $3}'

ilovespam · 2012-07-18 02:47:12 3
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What's this?

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RTFM function

RTFMFTW.

The simplest way to transport information over a network

Einstein's razor: As simple as possible, but not simpler. On the destination machine netcat listens on any port (1234 in the example) and sends anything it receives into a file or pipe. On the source machine a separate netcat takes input from a file or pipe and sends it over the network to the listener. This is great between machines on a LAN where you don't care about authentication, encryption, or compression and I would recommend it for being simpler than anything else in this situation. Over the internet you should use something with better security.

list block devices

Shows all block devices in a tree with descruptions of what they are.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Find the package that installed a command

Generate a random password 30 characters long

This command is similar to the alternate, except with head(1), you can pick as many passwords as you wish to generate by changing the number of lines you wish to preview.

ignore .DS_Store forever in GIT

With a couple of little commands, you?ll be able to ignore the .DS_Store files forever from your git repositories on mac! The following command will add the .gitignore file to the git configuration git config --global core.excludesfile ~/.gitignore then, the following, will add the .DS_Store to the list echo .DS_Store >> ~/.gitignore

a function to find the fastest DNS server

http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list.

Cut flv video from minute 19 to minute 20 using flvtool2

We should calculate the video duration to milliseconds, 1 minute = 60000 milliseconds

Create a file of repeated, non-zero

dd can be used with /dev/zero to easily create a file of all zero-bytes. Pipe that through tr and use octal conversions to change the byte values from zero to 0xff (octal 0377). You can replace 0377 with the byte of your choice. You can also use \\0 and \\377 instead of the quoted version.

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