Commands using printf sorted by votes

Commands using printf (206)

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Find highest context switches

This command will find the highest context switches on a server and give you the process listing. Show Sample Output
This is sample output - yours may be different.
```
Context Switches: 1097211 - Process : [migration/12]
Context Switches: 1500058 - Process : [migration/10]
Context Switches: 1558813 - Process : [migration/13]
Context Switches: 2207748 - Process : [migration/11]
Context Switches: 2516720 - Process : /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/lib/mysql/server.err --open-files-limit=12288 --pid-file=/var/lib/mysql/server.pid
```
0

grep -H voluntary_ctxt /proc/*/status |gawk '{ split($1,proc,"/"); if ( $2 > 10000000 ) { printf $2 " - Process : "; system("ps h -o cmd -p "proc[3]) } }' | sort -nk1,1 | sed 's/^/Context Switches: /g'

jperkster · 2012-09-01 19:43:47 54
Aligns NIC device names and associated IPs.
This is sample output - yours may be different.
0

/sbin/ifconfig |awk '/bond|eth/{getline i;printf $0" ";printf "%s\n", i" "}'|awk '{print $1,substr($7,6)}'

omatictost · 2012-10-25 16:08:15 4
List the size (in human readable form) of all sub folders from the current location

Lists the size in human readable form and lists the top 25 biggest directories/files
This is sample output - yours may be different.
0

du . | sort -nr | awk '{split("KB MB GB TB", arr); idx=1; while ( $1 > 1024 ) { $1/=1024; idx++} printf "%10.2f",$1; print " " arr[idx] "\t" $2}' | head -25

agas · 2012-12-03 02:59:13 4

read ajp13 packet contents on terminal using tshark 1.4.15

if you have a capture file *.eth, and ajp protocol is in use on port 9009, you can paste the above command. You can change the fiile and port name Show Sample Output

tshark -r *.eth -S -R "ajp13" -d tcp.port==9009,ajp13 -s 0 -l -V | awk '/Apache JServ/ {p=1} /^ *$/ {p=0;printf "\n"} (p){printf "%s\n", $0} /^(Frame|Internet Pro|Transmission Control)/ {print $0}'

tsureshkumar · 2013-01-10 21:12:51 4

Show numerical values for each of the 256 colors in bash for bold and normal fonts

Shows the ?rendering? for each of the 256 colours in both the bold and normal variant. Using seq is helpful to get even lines, passing $((COLUMNS*2)) to column sort-of-handles the nonprintable characters.
This is sample output - yours may be different.
0

for code in $(seq -w 0 255); do for attr in 0 1; do printf "%s-%03s %bTest%b\n" "${attr}" "${code}" "\e[${attr};38;05;${code}m" "\e[m"; done; done | column -c $((COLUMNS*2))

claudius · 2013-01-13 18:23:44 4
Batch rename and number files

This command will take the files in a directory, rename them, and then number them from 1...N. Black belt stuff. Hell of a time saver.
This is sample output - yours may be different.
0

find . -name '*.jpg' | awk 'BEGIN{ a=0 }{ printf "mv %s name%01d.jpg\n", $0, a++ }' | bash

doublescythe · 2013-02-07 06:12:37 4

Print data from field 9 till the end separated by a white space and new record separated by newline.

It'll print the file names preserving the spaces in their names and adding new line after every new filename. I wrote this to quickly find out how many files in any directory is owned by a particular user. This can be extended using pipe and grep to do much more. Show Sample Output

awk '{for (i=9;i<=NF;i++) {printf "%s",$i; printf "%s", " ";}; printf "\n"}'

adimania · 2013-02-12 13:57:43 4

Batch rename and number files

The '1' in '%01d' changes the amounts of digits in the integer, eg. 1 vs 0001.
This is sample output - yours may be different.
0

count='1'; for i in *.jpg; do mv $i $(printf '%01d'.jpg $count); (( count++ )); done

lalanza808 · 2013-02-20 06:38:25 6
Create an alias command that clears the screen and scroll back buffer (in putty and xterm)
This is sample output - yours may be different.
0

alias clearscrollback='clear;printf %b "\033[3J"'

richardellisjr · 2013-03-19 14:18:22 4
Clear terminal screen as well as terminal buffer

clear command doesn't actually clear the terminal because if you scroll you can still see output from the previous commands. Using this command you can clear your terminal screen as well as buffer.
This is sample output - yours may be different.
0

printf "\ec"

soroosh · 2013-05-29 18:10:22 58
kvm disk info

This will strip out the relivent disk information from kvm. I'm using it to find disks on a SAN which are no longer in use. Show Sample Output
This is sample output - yours may be different.
```
name0 --      <source dev='/dev/mapper/name0-os'/>
      <source file='/dev/mapper/name0-data'/>
name1 --      <source dev='/dev/mapper/name1-os'/>
      <source file='/dev/mapper/name1-data'/>
```
0

while read X ; do printf "$X --"; virsh dumpxml $X | egrep "source dev|source file"; done< <(virsh list | awk '$1 ~ /^[1-9]/ { print $2 }')

hugme · 2013-07-29 17:32:59 1213
Remap Nic aliases from PCI location

for redhat systems works sometimes :S tested on dell poweredge r7+ systems
This is sample output - yours may be different.
0

lspci -vv | grep 'Ethernet\|Serial' | awk 'NR == 1{ printf $1 } NR == 2 { print " mac " $7 }' | sed ?e 's/-/:/g' -e 's/:f[ef]:f[ef]//g' -e 's/01:00.0/eth0/g' -e 's/01:00.1/eth1/g' -e 's/01:00.2/eth2/g' -e 's/01:00.3/eth3/g' > /etc/iftab && ifrename

PROJAK_SX · 2014-03-01 20:07:18 6
Extract domain from URl

Extracts domain and subdomain from given URl. See examples. Show Sample Output
This is sample output - yours may be different.
```
http://www.example.com/more/stuff > example.com
https://test.example.com > example.com
http://example.com > example.com
http://www.example.co.uk > example.co.uk
https://www.example.com.au > example.com.au
```
0

MYURL=http://test.example.com ; awk -F/ '{ print $3 }' <<< $MYURL | awk -F. '{ if ( $(NF-1) == "co" || $(NF-1) == "com" ) printf $(NF-2)"."; print $(NF-1)"."$(NF); }'

snafu · 2014-05-26 07:31:40 7
Get the total length of all videos in the current dir in H:m:s

Use case insensitive regex to match files ending in popular video format extensions and calculate their total time. (traverses all files recursively starting from the current directory) Show Sample Output
This is sample output - yours may be different.
```
203:11:32
```
0

find -type f -iregex '.*\.$mkv\|mp4\|wmv\|flv\|webm\|mov\|dat\|flv$' -print0 | xargs -0 mplayer -vo dummy -ao dummy -identify 2>/dev/null | perl -nle '/ID_LENGTH=([0-9\.]+)/ && ($t +=$1) && printf "%02d:%02d:%02d\n",$t/3600,$t/60%60,$t%60' | tail -n 1

powerinside · 2014-06-07 15:50:41 6
Highlight and beep on regular expression match

Usage: command | hl 'regex'
This is sample output - yours may be different.
0

hl() { while read -r; do printf '%s\n' "$(perl -p -e 's/('"$1"')/\a\e[7m$1\e[0m/g' <<< "$REPLY")"; done; }

nyuszika7h · 2014-08-05 22:29:08 8
rename files (in this case pdfs) numerically in date order

Caution: distructive overwrite of filenames Useful for concatenating pdfs in date order using pdftk
This is sample output - yours may be different.
0

find . -name "*.pdf" -print0 | xargs -r0 stat -c %y\ %n | sort|awk '{print $4}'|gawk 'BEGIN{ a=1 }{ printf "mv %s %04d.pdf\n", $0, a++ }' | bash

Randy_Legault · 2014-09-23 06:40:45 9
Get ipv4 remote address bad score using wafsec.com free reputation service api

ipscore <your ip> number ipscore 186.78.151.135 2 a high score represents a bad remote address (honeypot, tor, botnet..) Show Sample Output
This is sample output - yours may be different.
```
2
```
0

function ipscore() { local OLD_IFS="$IFS" IFS=","; local result="`curl -s "http://wafsec.com/api?ip=$1"`" && local results=(${result}) && printf -- '%s\n' "${results[@]}" | grep '"Score":' | cut -d':' -f2; IFS="$OLD_IFS"; }; ipscore ${target_ip}

LoadLow · 2014-11-20 23:18:46 8
Open all files in directory with sublime text
This is sample output - yours may be different.
0

subl `grep -R <text> <path> | awk -F: '{ printf $1" " }'`

joventuraz · 2014-11-26 18:04:59 15
awk zero pad last field in variable-length record

The sample output shows each record/row with the last field zero-padded to 26 digits. For testing, I used (L)ine and field/column numbers.... Line 4, field2 = L42, etc up to the last field where I just used line numbers X 4. I had some whitespace-delimited files with variable-length records/rows (having 4 - 5 fields/columns) which required reformatting by zero-padding the last field to 26 digits. This requires setting NF (Not $NF) as an awk variable, with a simple conditional that assumes that any line where (N)umber of (F)ields does NOT equal 4 has a NF of 5. If needed, more conditional checks can be added, and the "NF" changed to any field ($1, $5, etc). Show Sample Output
This is sample output - yours may be different.
```
L11 L12 L13 L14 00000000000000000000001111
L21 L22 L23 L24 00000000000000000000002222
L31 L32 L33 L34 00000000000000000000003333
L41 L42 L43 00000000000000000000004444
L51 L52 L53 00000000000000000000005555
L61 L62 L63 L64 00000000000000000000006666
```
0

awk '{var = sprintf(NF); if (var == 4) printf "%s %s %s %026d\n" , $1,$2,$3,$4; else printf "%s %s %s %s %026d\n" , $1,$2,$3,$4,$5}' yourfilegoes.here >> yournewfilegoes.here

genatomics · 2014-12-20 02:53:35 8
something like 'git log -p' but for svn

from a svn repo, print a log, with diff, of each commit touching a given file
This is sample output - yours may be different.
0

FILE=somefile.js; LOG=~/changes.diff; truncate -s0 ${LOG}; for change in $(svn log ${FILE} | awk -F' | ' '/^r[0-9]+/{print $1}'); do svn log -c ${change} >> ${LOG}; printf "\n" >> ${LOG}; svn diff -c ${change} >> ${LOG}; printf "\n\n\n" >> ${LOG}; done

hochmeister · 2014-12-23 20:00:54 9
Calculate Duration Of Files In Directory

When you want to know the duration of all your mp3 files in the current working directory this command will tell you based on exif data. Since it relies on exif data it can be used against other files like movies, ogg vorbis etc. also. Useful when you want to know how long it will take to listen to an album or series of lectures. Show Sample Output
This is sample output - yours may be different.
```
3:15:29
```
0

exiftool * | grep '^Duration' | sed 's/^.*[[:space:]]$[0-9]*:[0-9]*:[0-9]*$.*$/\1/g' | awk -F':' '{ H+=$1;M+=$2;S+=$3 } END { printf "%d:%d:%d\n", int(H+int(M/60)),int(M+S/60)%60,S%60 }'

keyboardsage · 2015-06-17 06:20:47 9
Find Rhyming Words

rhyme time mime rhyme lowrez Juarez
This is sample output - yours may be different.
0

rhyme() { { cat /usr/share/dict/words; printf %s\\n "$1"; } | rev | sort | rev | grep -FxC15 -e "${1?}" | grep -Fxve "$1" | shuf -n1; }

lowrez · 2016-01-02 03:24:44 13
list lines changed per all authors of a git repository
This is sample output - yours may be different.
0

for i in $(git log --format='%ae' | sort -u); do echo $i; git log --author="$i" --pretty=tformat: --numstat | awk '{ add += $1; subs += $2; loc += $1 - $2 } END { printf "added lines: %s, removed lines: %s, total lines: %s\n", add, subs, loc }' - done

flavioab · 2016-01-27 20:46:51 11
repeat any string or char n times without spaces between

Works for fixed count of repeats because of the {1..20}. For variable count, replace "{1..20}" by "$(seq 1 $n)". Show Sample Output
This is sample output - yours may be different.
```
xyzxyzxyzxyzxyzxyzxyzxyzxyzxyzxyzxyzxyzxyzxyzxyzxyzxyzxyzxyz
```
0

printf -- 'xyz%.0s' {1..20}

BinaryZebra · 2016-04-03 19:36:47 13
Hide what you've done so far

Clears the history, clear the terminal and clear the scroll-back. The .bash_history will not be affected but every command done before will NOT be recorded to .bash_history. The CTRL+R won't show previous commands and it will be impossible to scroll-up to see what you've done so far. In a word, it cover your tracks.
This is sample output - yours may be different.
0

history -c && clear && printf "\e[3J"

bdelespierre · 2016-04-19 16:53:41 11
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Use result of the last command

\$ which python /usr/bin/python \$ ll `!!` lrwxrwxrwx 1 root root 9 2010-11-08 22:01 /usr/bin/python -> python2.6

Gentoo: Get the size of all installed packets, sorted

On a Gentoo system, this command will tell you which packets you have installed and sort them by how much space they consume. Good for finding out space-hogs when tidying up disk space.

How to run X without any graphics hardware

This starts an X server using Xvfb(1) (no graphics hardware required), then starts a VNC server on the display. Change :1 if there's a conflict with an existing display, and change 800x600x24 to suit your tastes (24 is the bit depth, 800x600 is the size). This command obviously requires X be installed, and also x11vnc(1); both are available via your favourite package manager. You can also use another VNC server of your choosing, as long as DISPLAY is set to the display of Xvfb(1). To change your desktop environment (the default is twm(1), which is rather fail), you can add it to your ~/.xinitrc file (see the startx(1) manpage for details).

Easily decode unix-time (funtion)

A shell function using perl to easily convert Unix-time to text. Put in in your ~/.bashrc or equivalent. Tested on Linux / Solaris Bourne, bash and zsh. using perl 5.6 and higher. (Does not require GNU date like some other commands)

Find the package that installed a command

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

finding cr-lf files aka dos files with ^M characters

Looking for carriage returns would also identify files with legacy mac line endings. To fix both types: $ perl -i -pe 's/\r\n?/\n/g' $(find . -type f -exec fgrep -l $'\r' "{}" \;)

Easy and fast access to often executed commands that are very long and complex.

When using reverse-i-search you have to type some part of the command that you want to retrieve. However, if the command is very complex it might be difficult to recall the parts that will uniquely identify this command. Using the above trick it's possible to label your commands and access them easily by pressing ^R and typing the label (should be short and descriptive). UPDATE: One might suggest using aliases. But in that case it would be difficult to change some parts of the command (such as options, file/directory names, etc).

list block devices

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

Get all shellcode on binary file from objdump

Better than the others, and actually works unlike some of them.

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Commands using printf (206)

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