Commands using echo sorted by votes

Commands using echo (1,545)

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Reset the last modified time for each file in a git repo to its last commit time

For OS X/bsd; probably messy
This is sample output - yours may be different.
0

git ls-files | while read file; do echo $file; touch -t $(date -jf "%s" $(git log --date=local -1 --format="@%ct" "$file" | cut -b 2-) +%Y%m%d%H%M) "$file"; done

oznogon · 2015-07-06 05:35:33 9
cd out n directories (To move n level out of current directory)

Additionally you cal also print the current directory in the end. cdb(){ range=$(eval "echo '{1..$1}'"); toPrint="'../%.0s' $range"; printfToEval=$(echo "printf $toPrint"); toCd=$(eval $printfToEval); eval "cd $toCd"; pwd; } Show Sample Output
This is sample output - yours may be different.
```
$ pwd
/Users/aapa/Projects/elasticsearch
$ cdb 1
$ pwd
/Users/aapa/Projects
$ cdb 2
$ pwd
/Users
```
0

cdb(){ range=$(eval "echo '{1..$1}'"); toPrint="'../%.0s' $range"; printfToEval=$(echo "printf $toPrint"); toCd=$(eval $printfToEval); eval "cd $toCd"; }

knoxxs · 2015-07-08 11:51:18 9
Randomly succeeding command

Command will succeed n% of the time. ran 75 will cause command to succeed 75% of the time. No argument will cause it to succeed 50% of the time. Show Sample Output
This is sample output - yours may be different.
```
$ for i in {1..1000}; do ran 75 >> /tmp/ran_test; done
$ grep -c TRUE /tmp/ran_test
776
$ for i in {1..10}; do ran 75 >> /tmp/ran_test; done
$ grep -c TRUE /tmp/ran_test
7
$ for i in {1..1000000}; do ran 16 >> /tmp/ran_test; done
$ echo $(grep -c TRUE /tmp/ran_test)/1000000 | bc -l
.15952300000000000000

ran 80
TRUE
```
0

ran() { R=$((RANDOM%100)); if [ $R -gt "${1:-50}" ]; then echo FALSE; false; else echo TRUE; true; fi; }

snipertyler · 2015-07-15 15:34:56 9
Prepend text to a file
This is sample output - yours may be different.
0

echo "text to prepend" | cat - file

rahouni · 2015-07-17 11:15:34 9
Continuously show wifi signal strength on a mac

Shows the WiFi signal strength without having to display thousands of lines Show Sample Output
This is sample output - yours may be different.
```
Wifi signal strength: -34
```
0

while i=1; do echo -ne 'Wifi signal strength:' $(/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I | grep CtlRSSI | awk {'print $2'}) '\r'; sleep 0.5; done

ackgrep · 2015-07-19 11:52:04 9
Find Malware in the current and sub directories by MD5 hashes

This command does something similar using dig which is usually more available. Show Sample Output
This is sample output - yours may be different.
```
./.ssh/authorized_keys 
./.bash_logout 
./.viminfo 
./.history/20150630 
./.history/20150527 
./.history/20150728 
./.history/20150715 
./.history/20150625 
./.history/20150624 
./.history/20150610 
./.history/20150623 
./.history/20150609 
./.history/20150608 
./.profile 
./.lesshst 
./.bashrc 
./eicar.com.txt "1370411585 100"
```
0

for i in $(find . -type f); do echo -n "$i " ;dig +short $(md5sum $i | cut -d' ' -f1).malware.hash.cymru.com TXT; echo ; done

cerasus · 2015-07-28 09:58:04 8
remove accents from file name

I had trouble with accent I could do a simple mv by hand but it is not efficient. I found this online http://www.unix.com/shell-programming-and-scripting/158635-remove-spanish-accent-file-name.html but I could not specify the accented letter direcly because it is not in the same encoding as my cli so I changed the char for their octal value. to add accent I use this table http://linux.about.com/library/cmd/blcmdl7_iso_8859-1.htm and add the values to the tr part. the other "duplicates" where not working for me. comment to help me better this script. :) Show Sample Output
This is sample output - yours may be different.
```
st?phanie[85].docx is renamed to stephanie[85].docx
```
0

for f in *; do tmp_f=`echo $f | tr "\351" "e"`; if [ "$tmp_f" != "$f" ]; then mv $f $tmp_f; echo "$f is renamed to $tmp_f"; fi done

weapstyle · 2015-08-05 15:56:05 11
Make .bashrc function to backup the data you changed last houres

Make a backup of the data you have changed last. After running only type backup in new cmd and all files will be in a tar archive in /tmp.
This is sample output - yours may be different.
0

echo "function backup() { find ~ -type f -mtime 0 | tar cvfz /tmp/24h-backup.tar.gz -T - ;}" >> ~/.bashrc

maltego · 2015-08-13 14:43:21 13
Return ZSH colors
This is sample output - yours may be different.
0

echo ${(o)color}

slempke · 2015-08-18 19:23:17 10
Salvage a borked terminal

Works almost every time.
This is sample output - yours may be different.
0

echo -e \\033c

quesne · 2015-08-20 10:54:49 10
Send your svn diff to meld

but can't diff dir...
This is sample output - yours may be different.
0

echo 'diff-cmd = meld' >> ~/.subversion/config

unixmonkey89911 · 2015-09-08 10:06:51 10
printing text between tags
This is sample output - yours may be different.
0

echo or cat something | grep -Po '(?<=text_before).*(?=text_after)'

petteriIII · 2015-09-11 09:19:57 9
Pipe to X11 clipboard

This sequence of pipes will strip the last newline and send the remainder to the X11 clipboard. I have it as: alias clipb='perl -pe "chomp if eof" | xclip -selection c' so I can just do "echo hello | clipb" Multi-line texts will keep their internal newlines, but the last newline will be removed. This usually makes most sense. Show Sample Output
This is sample output - yours may be different.
```
This will add the value of $MYFILE (without trailing newline) to the X11 clipboard
```
0

echo $MYFILE | perl -pe "chomp if eof" | xclip -selection c

magicus · 2015-09-18 10:50:12 8
Get all shellcode on binary file from objdump
This is sample output - yours may be different.
0

echo "\"$(objdump -d BINARY | grep '[0-9a-f]:' | cut -d$'\t' -f2 | grep -v 'file' | tr -d " \n" | sed 's/../\\x&/g')\""

reiderroque · 2015-09-25 20:21:26 11
Global BTC rate in EUR

Returns the global weighted BTC rate in EUR. Requires the "jq" JSON parser. Show Sample Output
This is sample output - yours may be different.
```
BTC rate is 213.53 ?
```
0

echo "BTC rate is" $(wget https://api.bitcoinaverage.com/ticker/global/EUR/ -q -O - | jq ".last") "?"

lordtoran · 2015-09-28 23:03:59 13
pretty print environment variable PATH

Echo $PATH isn't very easy to read. Show Sample Output
This is sample output - yours may be different.
```
/bin
/home/wbg/anaconda/bin
/home/wbg/bin
/sbin
/usr/bin
/usr/local/bin
/usr/local/sbin
/usr/sbin
```
0

echo $PATH | sed 's/:/\n/g' | sort | uniq

wbg · 2015-09-30 05:55:51 13
Monitor memory fine-grained usage (e.g. firefox)

I have modified the original one-liner to allow it to manage multiple PIDs. However, I haven't found the way it can work properly with the watch command. NOTE: brace expand must be activated via "set -B" in order to this script can work. Show Sample Output
This is sample output - yours may be different.
```
961936 KB
```
0

cat $(echo "ls /proc/{`pidof firefox | sed -e 's/$/,/' -e 's/ /,/g'`}/smaps 2>/dev/null" | bash) | awk '/Rss/{sum += $2; } END{print sum, "KB"}'

pchalim · 2015-09-30 22:22:53 9
Force laptop "idle" mode action when laptop lid is closed

Force computer "idle" state when lid is closed, regardless of inhibitors (power manager) in place, and runs logind preset action (sleep, suspend...). See http://www.freedesktop.org/software/systemd/man/logind.conf.html
This is sample output - yours may be different.
0

echo 'LidSwitchIgnoreInhibited=no' > /etc/systemd/logind.conf.d/respect-inhibit-lid.conf

lolssl · 2015-10-01 17:20:26 12
Current directory disk usage by day for last 90 days in GB
This is sample output - yours may be different.
0

for x in {0..90}; do { echo $x $(find . -type f -mtime $x -exec du -cs {} \; |awk -F " " '{sum+=$1} END {sum/=1048576}END{print sum,"G"}'); }; done

g0dsp33d · 2015-10-08 18:19:00 9
checking if an IP is valid.
This is sample output - yours may be different.
0

echo $IP | egrep '^(([0-9]{1,2}|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}([0-9]{1,2}|1[0-9][0-9]|2[0-4][0-9]|25[0-5])$'

andregyn62 · 2015-10-19 18:06:32 11
Ensuring that the IP has no strange characters

This command validates if exist any character different in 0-255 and dot. If any characters different is typed the error menssage is showing. Show Sample Output
This is sample output - yours may be different.
```
IP="192.168.1.1"
checking=`echo ${IP} | sed "s/[0-9\.]//g"`;
if [ "${checking}" != "" ]; 
   then 
           echo "Please type only numeric characters separated for dot";
   exit;
fi
```
0

echo ${IP} | sed "s/[0-9\.]//g"

andregyn62 · 2015-10-19 18:20:03 11
Use /etc/fortune as signature in thunderbird

In Thunderbird open the settings for your email account, mark the checkbox for 'Attach the signature from a file instead' and use the filename '~/mailsignature.txt' Now every time when you open a terminal you see the fortune displayed in the terminal and the mail signature gets regenerated. Show Sample Output
This is sample output - yours may be different.
```
--
After an instrument has been assembled, extra components will be found on the bench.
```
0

echo 'echo /etc/games/fortune > ~/mailsignature.txt' >> .bashrc

dededede · 2015-11-07 15:17:12 11
Calculate CPU load limit on GNU/Linux

shell order of operation example which calculates: x = number of physical CPU's y = number of cores per CPU 2(x * y) + 1 = CPU load limit Show Sample Output
This is sample output - yours may be different.
```
9
```
0

echo "$(( $(( $(grep 'physical id' '/proc/cpuinfo' | uniq | wc -l) * $(grep 'core id' '/proc/cpuinfo' | wc -l) )) * 2 + 1 ))"

snorf · 2015-11-14 20:44:39 11
Days left before password expires
This is sample output - yours may be different.
0

let NOW=`date +%s`/99516 ; PASS_LAST_CHANGE=`grep $USER /etc/shadow | cut -d: -f3` ; PASS_LIFE=`grep $USER /etc/shadow | cut -d: -f5`; DAYS_LEFT=$(( PASS_LAST_CHANGE + PASS_LIFE - NOW)) ; echo $DAYS_LEFT

Dentorman · 2015-11-20 04:45:44 11
Loop over the days of a month, in $YYYY$MM$DD format
This is sample output - yours may be different.
0

YYYY=2014; MM=02; for DD in $(cal $MM $YYYY | grep "^ *[0-9]"); do [ ${#DD} = 1 ] && DD=0$DD; echo $YYYY$MM$DD; done

Dentorman · 2015-11-20 09:37:14 705
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Get the dir listing of an executable without knowing its location

Adding Prefix to File name

Good old bracket expansion :-) For large numbers of files, "rename" will spare you the for-loop, or the find/exec...

Exclude inserting a table from a sql import

Starting with a large MySQL dump file (*.sql) remove any lines that have inserts for the specified table. Sometimes one or two tables are very large and uneeded, eg. log tables. To exclude multiple tables you can get fancy with sed, or just run the command again on subsequently generated files.

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

Default value or argument

I used it for this function, which prints hashes: function liner { num_lines=${1:-42} echo printf %${num_lines}s|tr " " "#" echo } Note the colon-dash, instead of the usual colon-equals.

parrallel execution of a command on remote hosts by ssh or rsh or ...

parrallel execution of a command on remote host by ssh or rsh or ... very useful for cluster management (software update)

Have a smile

Outputs utf-8 smileys

list all opened ports on host

in loop, until the last port (65535), list all opened ports on host. in the sample I used localhost, but you can replace with any host to test.

Get AWS temporary credentials ready to export based on a MFA virtual appliance

Check if your desired password is already available in haveibeenpwnd database. This command uses the API provided by HIBP

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Commands using echo (1,545)

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