Commands using echo sorted by votes

Commands using echo (1,545)

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Convert control codes to visible Unicode Control Pictures

Not better, but more lightweight (sed instead of perl). Above command is reduced due to length restriction of less than 256 characters and entity encoding of "Save" command on this page. This is complete command (best without entity encoding): echo -e '\x2Helo folks\t!\r' | sed "y/\x0\x1\x2\x3\x4\x5\x6\x7\x8\x9\xA\xB\xC\xD\xE\xF\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F\x20/␀␁␂␃␄␅␆␇␈␉␊␋␌␍␎␏␐␑␒␓␔␕␖␗␘␙␚␛␜␝␞␟␠/" ␂Helo␠folks␉!␍ Show Sample Output
This is sample output - yours may be different.
```
&#9218;Helo&#9248;folks&#9225;!&#9229;
```
0

echo -e '\x2Hello, folks\t!\r' | sed "y/\x2\x9\xD\x20/␂␉␍␠/"

hermannsw · 2014-06-30 14:42:15 7
Btrfs: Find file names with checksum errors

btrfs checksum errors console report. Show Sample Output
This is sample output - yours may be different.
```
btrfs checksum error(s) on: 
         dev /dev/sda5, path: lib/mysql/ib_logfile0
         dev /dev/sda5, path: lib/mysql/ibdata1
         dev /dev/sda5, path: log/warn
```
0

echo "btrfs checksum error(s) on: " && grep "btrfs: checksum error at logical" /var/log/messages | sed -e 's/^.*$ dev .*$$, sector.*$$path\: .*$)/\t\1, \3/' | sort | uniq

jcoll · 2014-07-01 08:56:05 7
SSH/wmic to remotely kill a process on a windows box

Tested on Windows 8 w/SSH, Cygwin - it can be tricky to quote if you dont use the $(..) syntax to echo it back out Show Sample Output
This is sample output - yours may be different.
```
Deleting instance \\YOUR-PC\ROOT\CIMV2:Win32_Process.Handle="4824"
Instance deletion successful.
```
0

ssh <user>@<ip address> $(echo wmic process where \"name like \'%<process to kill>%\'\" delete)

adanisch · 2014-07-02 04:41:05 6
Git autocomplete

Downloads this raw script https://github.com/git/git/blob/master/contrib/completion/git-completion.bash from Github, copies it to your home directory, autoloads it in ~/.bashrc and sources it.
This is sample output - yours may be different.
0

wget https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash; mv git-completion.bash ~/.git-completion.bash; echo "source ~/.git-completion.bash" > ~/.bashrc; source ~/.git-completion.bash

servel333 · 2014-07-22 14:21:00 21
generate a uuid

piped this to pbcopy (OSX only) you got a uuid in the pasteboard Show Sample Output
This is sample output - yours may be different.
```
bcb6256f-75f2-4d3b-936e-4d86b29c6a24
```
0

echo "import uuid\nimport sys\nsys.stdout.write(str(uuid.uuid4()))" | python

tippy · 2014-07-23 07:43:01 8
Change directory for current path (in bash)

change the path where you are, when is executed, is usefule when you've got folders to classify something like a tags, you've got devel/dist, android/ios, etc. like: ~user/Documents/devel/project ~user/Documents/dist/project You can change between devel/project folder to dist/project without leave project. If somebody has a better idea to do that without replace command. Show Sample Output
This is sample output - yours may be different.
```
/home/user/Documents/devel -> /home/user/Documents/dist
```
0

changeFolder() { if [ $# -ne 2 ]; then echo "Usage: changeFolder old new"; return; fi; old=$(pwd); folder=$(echo "$old" | sed -e "s/$1/$2/g"); if [ ! -d "$folder" ]; then echo "Folder '$folder' not found."; return; fi; echo "$old -> $folder"; cd $folder;}

Dracks · 2014-07-29 15:36:32 7
Check CRL expiration time

Downloads a CRL file, determines the expiration time, and checks when it will expire Show Sample Output
This is sample output - yours may be different.
```
OK
```
0

[ `curl 'http://crl.godaddy.com/gds5-16.crl' 2>/dev/null | openssl crl -inform DER -noout -nextupdate | awk -F= '{print $2}' | xargs -I{} date -d {} +%s` -gt `date -d '8 hours' +%s` ] && echo "OK" || echo "Expires soon"

hufman · 2014-08-07 17:18:38 8
Update music info with public database data

echoprint identify your song, then return artist, song name and album name(release) in a JSON. jq parse it and mp3info set the data in your mp3 file. of course it depends on: mp3info jq echoprint You need to set the environment variable export CODEGEN_NEST_API_KEY='YOUR_ECHONEST_KEY_HERE' You can use it with find, but probably will bypass the 120 request/minute of developer account key. So, use a sleep to do it. Something like: find -name \*.mp3 | while read $f; do eval echo $(echoprint-codegen "$f" | jq ' .[0].metadata | "mp3info -a \"" + .artist + "\" -t \"" + .title + "\" -l \"" + .release + "\" \"" + .filename + "\"" ' ) | bash; sleep 1; done
This is sample output - yours may be different.
0

eval echo $(echoprint-codegen "/path/to/file.mp3"| jq ' .[0].metadata | "mp3info -a \"" + .artist + "\" -t \"" + .title + "\" -l \"" + .release + "\" \"" + .filename + "\"" ' ) | bash

glaudiston · 2014-08-08 21:14:53 8
Turn on NFS Debugging

echo 1 > /proc/sys/sunrpc/nfs_debug && tail -f /var/log/messages to debug NFS issues.
This is sample output - yours may be different.
0

echo 1 > /proc/sys/sunrpc/nfs_debug

harpo · 2014-08-12 14:40:55 9
check web site status
This is sample output - yours may be different.
0

if [ "`curl -s --head domain.tld | grep HTTP | cut -d" " -f2`" != "200" ];then echo "error"; echo "doing else" ;fi

sckn · 2014-08-15 06:28:46 8
bored of the waiting for moderation
This is sample output - yours may be different.
0

echo "bored of the awaiting moderation"

teraflops · 2014-08-19 01:22:31 8
Check if a process is running (Windows)

There are many ways to do it on *nix. But on Windows, it's a bit convoluted. I use the above command expression in a batch file to check if a process is running already before running it again. I use this is a batch file I created to switch between 2 different versions of PowerBuilder (PB). I wanted to make sure, one version of PB is not running, before letting the user to switch, hence this check. (replace notepad.exe with PB125.exe above). /nh means no header, /fi means filter. We are filtering for Notepad.exe only above. Then, we take that and look for Notepad.exe using a FindStr command. It will still work, even if we don't have those 2 flags, but it makes finding the right program quicker. && and || are part of the conditional expressions see here: http://www.robvanderwoude.com/condexec.php. We use these to print for the IF...ELSE condition. >nul is the equivalent of Unix /dev/null Rest is self explanatory, I think. Show Sample Output
This is sample output - yours may be different.
```
Notepad is running
```
0

tasklist /nh /fi "imagename eq notepad.exe" | findstr /i "notepad.exe" >nul && (echo Notepad is running)|| (Echo Notepad is not running)

unixmonkey80767 · 2014-08-22 00:52:19 12
List Canon CR2 raw files which have been in-camera rated (5Dmk3+)
This is sample output - yours may be different.
0

for I in *.CR2; do if [ `exiv2 pr -p a -u $I | grep 'xmp.Rating' | awk '{ print $4 }'` == "1" ]; then echo $I; fi; done

jbuchbinder · 2014-09-10 03:31:44 8
10 files backup rotate in crontab

this command can be added to crontab so as to execute a nightly backup of directories and store only the 10 last backup files.
This is sample output - yours may be different.
0

for file in $(find /var/backup -name "backup*" -type f |sort -r | tail -n +10); do rm -f $file; done ; tar czf /var/backup/backup-system-$(date "+\%Y\%m\%d\%H\%M-\%N").tgz --exclude /home/dummy /etc /home /opt 2>&- && echo "system backup ok"

akiuni · 2014-09-24 14:04:11 10
Resource Monitoring

Monitoring system in one line : DISK : disk space MEM: memory ( mem , swap, Total) CPU : all information about cpu activity LOAD : load average Show Sample Output
This is sample output - yours may be different.
```
DISK:
94% /
6% /boot
0% /dev/shm
MEM:
total used free shared
Mem: 7983 7580 403
Swap: 12287 6 12281
Total: 20271 7586 12685
CPU:
0.3%us, 0.2%sy, 0.1%ni, 98.2%id, 1.1%wa, 0.0%hi, 0.1%si, 0.0%st
LOAD:
0.02 0.03 0.00 1/417 15018
```
0

echo "DISK:";df -Pl | grep -v "Filesystem" | awk '{print $5,$6}' ; echo "MEM:" ; free -mto | awk '{ print $1,$2,$3,$4 }'; echo "CPU:"; top -b -d1 -n1 | grep Cpu | awk '{print $2,$3,$4,$5,$6,$7,$8,$9}';echo "LOAD:"; cat /proc/loadavg

injez · 2014-09-29 12:43:52 35
Print out which hosts are not running specific process

Given a hosts list, ssh one by one and echo its name only if 'processname' is not running. Show Sample Output
This is sample output - yours may be different.
```
hostone
hosttwo
hostthree
```
0

for i in `cat hosts_list`; do RES=`ssh myusername@${i} "ps -ef " |awk '/[p]rocessname/ {print $2}'`; test "x${RES}" = "x" && echo $i; done

arlequin · 2014-10-03 14:57:54 9
Install every (not already installed) component of the Google Cloud SDK

Google Cloud SDK comes with a package manager `gcloud components` but it needs a bit of `sed` to work. Modify the "^| Not" bit to change the package selection. (The gcloud --format option is currently broken) Show Sample Output
This is sample output - yours may be different.
```
gcloud components update pkg-go pkg-java pkg-python app gae-python-launcher-mac gae-go gae-java gae-python
```
0

gcloud components list | grep "^| Not" | sed "s/|$.*$|$.*$|$.*$|/\2/" | xargs echo gcloud components update

wires · 2014-10-13 20:52:25 11
Get your external IP address

Easiest way to get the external IP address.
This is sample output - yours may be different.
0

echo $(wget http://ipecho.net/plain -q -O -)

KonKar · 2014-10-25 20:25:05 11
Equivalent to ifconfig -a in HPUX
This is sample output - yours may be different.
0

netstat -nr|egrep -v "Routing|Interface|lo0"|awk '{print $5}'|sort -u| while read l; do ifconfig $l ; echo " Station Addr: `lanscan -ia|grep "$l "|cut -d ' ' -f 1`" ; done

innominable · 2014-10-31 09:20:46 7
underscore to camelCase
This is sample output - yours may be different.
0

echo to_camel_case__variable | sed -r 's/(.)_+(.)/\1\U\2/g;s/^[a-z]/\U&/'

estani · 2014-11-05 13:23:01 8
relax with philosophy while taking a dig
This is sample output - yours may be different.
0

for i in `seq 1 100`; do echo "I think therefore I am" | espeak; done

marlboro · 2014-11-08 06:30:11 10
Create AUTH PLAIN string to test SMTP AUTH session
This is sample output - yours may be different.
0

authplain() { echo -n "AUTH PLAIN "; echo -n \\0$1\\0$2\\0 | base64; }

danky · 2014-11-26 15:24:08 8
Have a user generate an ssh key if it does not already exist and spit it in bold red to stdout
This is sample output - yours may be different.
0

if [ -e ~/.ssh/id_rsa.pub ] ; then echo $'\033[1;31m' ; cat ~/.ssh/id_rsa.pub ; echo $'\033[0m' ; else ssh-keygen -t rsa -b 4096 -f ~/.ssh/id_rsa -t rsa -P ""; echo $'\033[1;31m' ; cat ~/.ssh/id_rsa.pub ; echo $'\033[0m'; fi

sdoradus · 2014-12-01 03:48:19 8
Transpose column to row
This is sample output - yours may be different.
0

echo `echo -e "a\nb\nv"`

bejelith · 2014-12-02 07:40:53 7
pip shortcut to download a package and append it to your requirement.txt file in that project folder
This is sample output - yours may be different.
0

pipi () {pip install $1 && echo $(pip freeze | grep -i $1) >> requirements.txt;}

jkatzer · 2014-12-02 20:55:48 9
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Symlink all files from a base directory to a target directory

Symlinks all files in the base directory to the target directory then lists all of the created symlinks.

reverse order of file

Make the Mac OS X Dock 2D once more (10.5 and above only)

Mac OS X 10.5 (Leopard) introduced a new, 3D, reflective Dock. For those of us who prefer the Dock to be a little less distracting, this command is the answer. The Dock will be rendered in the same style as when pinned to the left- or right-hand side of the screen. Replace YES with NO to restore the 3D Dock.

convert video format to youtube flv format

Rename all (jpg) files written as 3 number in 4 numbers.

Useful if you have a list of images called 1 2 3 4 and so on, you can adapt it to rewrite it as 4 (in this example) 0-padded number.

Stamp a text line on top of the pdf pages.

To quickly add some remark, comment, stamp text, ... on top of (each of) the pages of the input pdf file.

scan folder to check syntax error in php files

remove newlines from specific lines in a file using sed

find all files containing a pattern, open them using vi and place cursor to the first match, use 'n' and ':n' to navigate

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

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Commands using echo (1,545)

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