Commands using echo sorted by votes

Commands using echo (1,545)

sorted by

Calculate comment density of shell scripts in a directory

Show Sample Output
This is sample output - yours may be different.
```
7882 lines = 7576 sloc [96%] + 306 comments [3%]
```
0

dir=/rom; a=$(find $dir -name \*.sh -exec cat '{}' \; | egrep -cv '^[[:space:]]*#'); b=$(find $dir -name \*.sh -exec cat '{}' \; | egrep -c '^[[:space:]]*#'); echo $((a+b)) lines = ${a} sloc [$((a*100/(a+b)))%] + ${b} comments [$((b*100/(a+b)))%]

koniu · 2016-05-19 08:35:56 86
Convert any text you type into sha1

Convert any text you type into sha1 Show Sample Output
This is sample output - yours may be different.
```
$echo -n "sua mensagem" | openssl sha1
0f1ef1d7a1dd0df4c4a9cd3dfb288e8e802980a8
$
```
0

echo -n "sua mensagem" | openssl sha1

gustavohmsilva · 2016-07-22 15:12:40 10
Depend behaviour on hour (e.g. "*" between 10 and 22 , and "#" between 23 to 9 )

echo 'Current hour' hour=$(date +%H) if [ $hour -gt 9 -a $hour -lt 23 ]; then echo -n '*'; else echo -n '#'; fi; echo ' '$hour; echo 'Test around the clock:' for hour in {0..23} {0..23}; do if [ $hour -gt 9 -a $hour -lt 23 ]; then echo -n '*'; else echo -n '#'; fi; echo ' '$hour; done echo 'If you need to depend on UTC, just add `-u` flag to `date` command' Show Sample Output
This is sample output - yours may be different.
```
* 22
```
0

hour=$(date +%H); if [ $hour -gt 9 -a $hour -lt 23 ]; then echo -n '*'; else echo -n '#'; fi; echo ' '$hour;

gwpl · 2016-07-26 20:53:59 11
One-liner to draw a spinning cursor pinwheel in a terminal
This is sample output - yours may be different.
0

for item in \\ \| / - \\ \| / - \\ \| / - \\ \| / - \\ \| / - \\ \| / -; do echo -ne "$item \r"; sleep .2; done; echo

iammyownalterego · 2016-08-03 13:10:03 12
Disk usage summary

Adds up the used disk space on all hard drives that are directly connected to the machine (i.e. no network mounts etc.) Assumes there are no IDE drives present. Show Sample Output
This is sample output - yours may be different.
```
18 GiB used in total
```
0

echo $(df -BG | grep sd | awk '{print $3}' | paste -sd+ | tr -d G | bc) GiB used in total

thureduehrsen · 2016-08-09 10:08:35 38
check open ports without netstat or lsof

Order and uniq
This is sample output - yours may be different.
0

declare -a array=($(tail -n +2 /proc/net/tcp | cut -d":" -f"3"|cut -d" " -f"1")) && for port in ${array[@]}; do echo $((0x$port)); done | sort | uniq

lucasjr76 · 2016-08-19 03:20:59 18
Join lines and separate with spaces
This is sample output - yours may be different.
0

echo `cat file.txt`

unixmonkey94613 · 2017-01-06 11:48:53 15
Chronometer

A way for tracking times in bash Show Sample Output
This is sample output - yours may be different.
```
1.963692732
5.074129173
7.986306243
10.075936725
10.673989319^C
```
0

stf=$(date +%s.%N);st=${stf/.*/};sn=%{stf/*./};for ((;;));do ctf=$( date +%s.%N );ct=${ctf/.*/};cn=${ctf/*./}; echo -en "\r$(echo "scale=3; $ctf-$stf" | bc)";done

glaudiston · 2017-01-26 13:20:30 18
Chronometer in hour format

Just add a format to chronometer in bash Show Sample Output
This is sample output - yours may be different.
```
00:00:58.949167828
00:01:03.670523001
```
0

stf=$(date +%s.%N);st=${stf/.*/};sn=%{stf/*./};for ((;;));do ctf=$( date +%s.%N );ct=${ctf/.*/};cn=${ctf/*./}; dtf=$(echo "scale=3; $ctf-$stf" | bc); dt=${dtf/.*/}; dt=${dt:=0};echo -en "\r$(date -u -d @$dt "+%H:%M:%S.${dtf/*./}")";done

glaudiston · 2017-01-26 13:42:53 18
search and cut between two strings

to find and cut between to strings with grep and cut Show Sample Output
This is sample output - yours may be different.
```
link to open
```
0

echo '<div class="Btn">link to open </div>' | grep -oP '(?<="Btn").*?(?= </div>)' | cut -d ">" -f2

aysadk · 2017-02-16 21:21:50 17

add time to make output and redirect it to a file

Will prepend date and time in the following format: dd-mm-yyyy@hh:mm:ss (24hours format) and redirect it to make.out file Show Sample Output

make -j 2>&1 | while IFS= read -r line; do echo "$(date +"%d-%m-%Y@%T") $line"; done > make.out

redowk · 2017-03-06 18:14:51 21

Toggle the Touchpad on or off
This is sample output - yours may be different.
0

synclient TouchpadOff=$(synclient -l | grep -q 'TouchpadOff.*1'; echo $?)

Cas00 · 2017-03-11 12:11:01 20
Calculate xor in bash

This command calculates the XOR from two given HEX numbers ($1 and $2) Show Sample Output
This is sample output - yours may be different.
```
0-F
```
0

echo $(( 0x$1 ^ 0x$2 ))

imjoseangel · 2017-04-09 11:34:46 60
Disable man-db cron and apt trigger
This is sample output - yours may be different.
0

echo 'man-db man-db/auto-update boolean false' |sudo debconf-set-selections

ara4sh · 2017-04-15 11:02:11 19
Test internet connection
This is sample output - yours may be different.
0

if nc -zw1 google.com 443 2>/dev/null; then echo 'Connected!'; fi

keith · 2017-04-19 12:18:43 32
Do mathematical operation on every line of a given file for the first value found to be replaced (other lines stay untouched)

The given file may contain any kind of characters. This is compatible for most simple mathematical operation. For the first number found, it will be replaced by the result of a factor operation of 1000. To change the filename or multiplactor or number regular expression, change the first fixed values. Show Sample Output
This is sample output - yours may be different.
```
For a given filename such as test.csv, a new filename new_test.csv will be created containing the new values after the math operation.
command source: cat test.csv
command output: cat new_test.csv
```
0

n=1000;f="test.csv";r='([0-9]+.{0,1}[0-9]*)';echo -n "" > new_${f};cat $f | while read l;do val=`echo $l | egrep -o $r` ; if [ ! -z $val ];then newval=`echo $val \* $n | bc -l`;l=`echo $l | sed "s/$val/$newval/"`;fi;echo $l >> new_${f};unset val;done

s333 · 2017-04-26 18:04:07 19
check if ufw (uncomplicated firewall) is enabled in bash

Show Sample Output
This is sample output - yours may be different.
```
disabled
```
0

if grep ENABLED=yes /etc/ufw/ufw.conf>/dev/null; then echo "enabled"; else echo "disabled"; fi

phrik · 2017-05-04 07:15:48 20
test and send email via smtps using openssl client
This is sample output - yours may be different.
0

(sleep 1;echo EHLO MAIL;sleep 1;echo "MAIL FROM: <a@foo.de>";sleep 1;echo "RCPT TO: <b@bar.eu>";sleep 1;echo DATA;sleep 1;echo Subject: test;sleep 1;echo;sleep 1;echo Message;sleep 1;echo .;sleep 1;)|openssl s_client -host b.de -port 25 -starttls smtp

idella · 2017-05-06 17:53:38 23
File count into directories

Show file count into directories. Usefull when you try to find hugh directories that elevate system CPU (vmstat -> sy) Show Sample Output
This is sample output - yours may be different.
```
76 -> /opt/node-v6.9.1-linux-x64/include/node/openssl
82 -> /opt/node-v6.9.1-linux-x64/lib/node_modules/npm/node_modules
97 -> /opt/kingsoft/wps-office/office6
152 -> /opt/kingsoft/wps-office/office6/chart/styles
```
0

find / -type d | while read i; do ls $i | wc -l | tr -d \\n; echo " -> $i"; done | sort -n

Zort · 2017-05-12 00:02:43 19
split email by @ with awk

splitting email by @ with awk Show Sample Output
This is sample output - yours may be different.
```
xxx.com
```
0

echo $mail | awk -F'@' '{print $2}'

aysadk · 2017-05-24 22:36:28 17
Get the current epoch in base32
This is sample output - yours may be different.
0

obase=16; echo "$(date +%s)" | bc | xxd -r -p | base32

malathion · 2017-06-26 16:58:38 22
Get bucket policy from a s3 buckets list
This is sample output - yours may be different.
0

for i in (aws s3api list-buckets --query "Buckets[].Name" | cut -d"," -f1 | grep -vE "\[|\]"); echo $i ; aws s3api get-bucket-policy --bucket (echo $i | xargs); end

tuannvm · 2017-07-19 15:56:54 19
send attachment file email
This is sample output - yours may be different.
0

echo "This is the message body" | mutt -a "/path/to/file.to.attach" -s "subject of message" -- recipient@domain.com

aysadk · 2017-07-28 13:58:10 17
Disable password expiration and clear password history for VMware vcenter appliance

Disable password expiration and clear password history for VMware vcenter appliance
This is sample output - yours may be different.
0

chage -M -1 root; echo "" > /etc/security/opasswd

tsener · 2017-07-30 21:26:43 52
send attachment email shell
This is sample output - yours may be different.
0

echo "This is the message body" | mutt -a "/tmp/aysad.gz" -s "Vv..Pp..nn" -- aysad@gmail.com

aysadk · 2017-08-25 22:12:31 30
‹ First < 47 48 49 50 51 > Last ›

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

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" }

move you up one directory quickly

In bash, this turns on auto cd. If a command is just a directory name, it cd's into that directory.

Get all upgradable deb packages in a single line

Works for debian and ubuntu based distros.

Detect illegal access to kernel space, potentially useful for Meltdown detection

Based on capsule8 agent examples, not rigorously tested

Copy an element from the previous command

You can specify a range via '-'.

macOS: Save disk space by moving apps to external drives

Because Mac app bundles contain everything in one place, it makes running them from anywhere, including from a device such as a USB flash drive or external HDD, possible. So if your Mac has a mere 256GB of storage (as mine does), you can free up large quantities of disk space by storing apps like, say, Xcode on external devices.

static noise effect (crt effect)

Hardlink all identical files in the current directory (regain some disk space)

Meaning of switches (see man page too): v verbose p ignore mode (permissions) o ignore owner, group t ignore time of modification Disadvantage: If you modify any linked file, this will propagate to all other files which occupy the same space.

Translates a phrase from English to Portuguese

Translates a string from English to Portuguese by using google translator web service.

Display summary of git commit ids and messages for a given branch

In color. Additionally you may define in your ~/.gitconfig and run it just as 'git one': one = log --pretty='format:%Cgreen%H %Cred%ai %Creset- %s'

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands using echo

Commands using echo (1,545) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

Commands using echo (1,545)

sorted by