Commands using echo sorted by votes

Commands using echo (1,545)

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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
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Send a binary file as an attachment to an email

The uuencode utility will encode your file so that it can be sent as an attachment to an email. It is part of the sharutils package in RHEL/CentOS/Fedora.

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Find files that have been modified on your system in the past 60 minutes

Useful mainly for debugging or troubleshooting an application or system, such as X11, Apache, Bind, DHCP and others. Another useful switch that can be combined with -mmin, -mtime and so forth is -daystart. For example, to find files that were modified in the /etc directory only yesterday: $ sudo find /etc -daystart -mtime 1 -type f

Quickest way to sort/display # of occurences

Capitalize first letter of each word in a string

Capitalize first letter of each word in a string.

Periodically run a command without hangups, and send the output to your e-mail

Run "ps -x" (process status) in the background every hour (in this example). The outputs of both "nohup" and "ps -x" are sent to the e-mail (instead of nohup.out and stdout and stderr). If you like it, replace "ps -x" by the command of your choice, replace 3600 (1 hour) by the period of your choice. You can run the command in the loop any time by killing the sleep process. For example $ ps -x 2925 ? S 0:00.00 sh -c unzip E.zip >/dev/null 2>&1 11288 ? O 0:00.00 unzip E.zip 25428 ? I 0:00.00 sleep 3600 14346 pts/42- I 0:00.01 bash -c while true; do ps -x | mail (...); sleep 3600; done 643 pts/66 Ss 0:00.03 -bash 14124 pts/66 O+ 0:00.00 ps -x $ kill 25428 You have mail in /mail/(...)

dump a single table of a database to file

Analyze awk fields

Breaks down and numbers each line and it's fields. This is really useful when you are going to parse something with awk but aren't sure exactly where to start.

Display condensed log in a tree-like format.

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

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Commands using echo (1,545)

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