All commands

All commands (14,042)

sorted by

List SAN Domains for a certificate Show Sample Output

echo | openssl s_client -connect google.com:443 2>&1 | openssl x509 -noout -text | awk -F, -v OFS="\n" '/DNS:/{x=gsub(/ *DNS:/, ""); $1=$1; print $0}'

shadyabhi · 2020-04-10 06:56:51 14

Monitor ETA using pv command

You can get an approximate idea of how long your data export might take. Show Sample Output
This is sample output - yours may be different.
```
[==================================>  ] 60% ETA 0:00:01
```
0

mysqldump --login-path=mypath sbtest sbtest4 | pv --progress --size 200m -t -e -r -a > dump.sql

shantanuo · 2020-03-30 09:15:16 34
List only empty directories and delete safely (=ask for each)

Will delete empty directories and sub-directories (hideen too = whose names are starting with dot .). Used 'rm' command instead of 'rmdir' to give the possibility of asking for confirmation before deleting i.e. it is not wise do delete all empty directories in /etc folder. Replace dot in 'find .' with any for other starting directory instead of current. in 'rm -i -R' 'i' stands for ask before delete and 'R' for delete folder recursively or folder itself if it is empty
This is sample output - yours may be different.
0

find . -type d -empty -exec rm -i -R {} \;

knoppix5 · 2020-03-29 13:12:21 14
find all executable files across the entire tree

I can think of using this command after compiling an downloaded source from anywhere as an easy way to find all executable products. We usually issue the find command (without arguments) to list the full paths of all directories and sub-directories and files in the entire current tree. Similar command is tree -aicfnF
This is sample output - yours may be different.
1

find -executable -type f

knoppix5 · 2020-03-29 11:46:18 18

Remove all cached images for icons related to your profile

Run inside Command Prompt (cmd.exe) as admin. Note that you must close explorer.exe first, and even so some files will not be deleted, will say "Access is denied." To definitely delete them enter with another admin user or from other operating system and access the drive. Show Sample Output

DEL /F /S /Q /A %LocalAppData%\Microsoft\Windows\Explorer\thumbcache_*.db

bugmenot · 2020-03-27 16:53:23 15

List packages manually installed with process currently running

Sometimes we install programs, we forget about them, and they stay there wasting RAM. This one-liner try to find them. Show Sample Output
This is sample output - yours may be different.
```
atom
virtualbox
bluez
mosquitto
teamviewer
```
1

ps -eo cmd | awk '{print $1}'| sort -u | grep "^/" | xargs dpkg -S 2>/dev/null | awk -F: '{print $1}' | sort -u | xargs apt-mark showmanual

pabloab · 2020-03-26 06:16:45 16
convert raw camera image to jpeg

raw image created by canon digital camera. Install using apt-get install ufraw
This is sample output - yours may be different.
0

for i in *.CR2; do ufraw-batch $i --out-type=jpeg --output $i.jpg; done;

shantanuo · 2020-03-22 03:08:23 17
Calculate pi to an arbitrary number of decimal places
This is sample output - yours may be different.
3

bc -l <<< "scale=1000; 4*a(1)"

cryptology_codes · 2020-03-11 15:58:21 12
Create POSIX tar archive

tar(1) and cpio(1) are not fully platform agnostic, although their file formats are specified in POSIX.1-2001. As such, GNU tar(1) might not be able to extract a BSD tar(1) archive, and ivce versa. pax(1) is defined in POSIX.1-2001. To extract an archive: pax -rf archive.tar
This is sample output - yours may be different.
2

pax -wf archive.tar /path

atoponce · 2020-03-06 13:56:46 8
Backup with versioning
This is sample output - yours may be different.
0

& 'C:\cwRsync_5.5.0_x86_Free\bin\rsync.exe' --force --ignore-errors --no-perms --chmod=ugo=rwX --checksum --delete --backup --backup-dir="_EVAC/$(Get-Date -Format "yyyy-MM-dd-HH-mm-ss")" --whole-file -a -v "//MyServer/MyFolder" "/cygdrive/c/Backup"

pascalv · 2020-03-06 10:17:42 9
Linux system calls of MySQL process
This is sample output - yours may be different.
0

strace -c -p $(pidof -s mysqld) -f -e trace=all

shantanuo · 2020-02-27 03:35:17 36
mysql status

cron entry to record mysql status every minute
This is sample output - yours may be different.
0

mysqladmin status >> /home/status.txt 2>> /home/status_err.txt

shantanuo · 2020-02-19 10:58:27 16
add a mysql user

username is dba and password is dba123
This is sample output - yours may be different.
0

grant all on *.* to 'dba'@'localhost' identified by 'dba123' with grant option;

shantanuo · 2020-02-19 10:56:07 10
find and remove old compressed backup files

remove all compressed files in /home/ folder not created in the last 10 days
This is sample output - yours may be different.
1

find /home -type f $ -name "*.sql.gz" -o -name "*.tar.gz" -mtime +10 $ -exec rm -rf {} \;

shantanuo · 2020-02-19 10:49:28 14
find and remove old backup files

remove all files in /home/ folder that starts with bk_all_dbProdSlave and not created in the last 2 days
This is sample output - yours may be different.
0

find /home/ -name bk_all_dbProdSlave_\* -mtime +2 -exec rm -f {} \;

shantanuo · 2020-02-19 10:47:34 9
InnoDB related parameters
This is sample output - yours may be different.
0

mysqladmin variables | egrep '(innodb_log_file|innodb_data_file)'

shantanuo · 2020-02-19 10:24:52 10
mysql backup utility
This is sample output - yours may be different.
0

mysqlbackup --port=3306 --protocol=tcp --user=dba --password=dba --with-timestamp --backup-dir=/tmp/toback/ --slave-info backup-and-apply-log --innodb_data_file_path=ibdata1:10M:autoextend --innodb_log_files_in_group=2 --innodb_log_file_size=5242880

shantanuo · 2020-02-19 10:24:15 9
port forwarding

pem file used by AWS servers for additional security
This is sample output - yours may be different.
1

ssh -L8888:localhost:80 -i nov15a.pem [email protected]

shantanuo · 2020-02-19 10:20:18 9
check mysql capacity to handle traffic
This is sample output - yours may be different.
-1

mysqlslap --query=/root/select_query_cp.sql --concurrency=10 --iterations=5 --create-schema=cvts1

shantanuo · 2020-02-15 10:40:39 8
show the difference
This is sample output - yours may be different.
2

diff file1 file2 --side-by-side --suppress-common-lines

shantanuo · 2020-02-15 10:38:44 31
Change values from 0 to 100
This is sample output - yours may be different.
0

awk '{if ($3 =="LAN" && $5 == "0.00" ) print $1, $2, "LAN", "288", "100.00"; else print $1 ,$2, $3, $4, $5 }' sla-avail-2013-Feb > sla-avail-2013-Feb_final

shantanuo · 2020-02-15 10:37:44 7
Extract queries from mysql general log

queries related to table 'Invoice_template' Show Sample Output
This is sample output - yours may be different.
0

grep -Eo '( *[^ ]* *){4}Invoice_Template( *[^ ]* *){4}' /mysql-bin-log/mysql-gen.log | head -10000 | sort -u

shantanuo · 2020-02-14 08:18:58 6
Slow Down Command Output

( Or ls -lat|lolcat -a if you like it in technicolor - apt install lolcat if needed )
This is sample output - yours may be different.
2

ls -alt|awk '{if (system("sleep .5 && exit 2") != 2) exit; print}'

knoppix5 · 2020-02-13 02:59:48 5
rsync should continue even if connection lost

Manage partial uploads using append option.
This is sample output - yours may be different.
1

rsync --archive --recursive --compress --partial --progress --append [email protected]:/backup/somefile.txt.bz2 /home/ubuntu/

shantanuo · 2020-02-11 13:48:22 5
rsync using pem file

Especially useful while syncing to Amazon EC2 instance. avz stands for archive verbose compress
This is sample output - yours may be different.
0

rsync -e 'ssh -i /root/my.pem' -avz /mysql/db/data_summary.* ec2-1-2-4-9.compute-1.amazonaws.com:/mysql/test/

shantanuo · 2020-02-11 13:45:32 7
< 1 2 3 4 5 > 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

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

retrieve the source address used to contact a given host

on multihomed hosts, connected to several networks, could be usefull to know the source address (local ip address) used to reach the target host, this command does not require root priviledges. The command use a TCP socket, if there is any error the command return an empty string, elsewhere return a valid ip address.

write text or append to a file

If you just want to write or append some text to a file without having to run a text editor, run this command. After running the command, start typing away. To exit, type . on a line by itself. Replacing the >> with a single > will let you overwrite your file.

ping a range of IP addresses

nmap accepts a wide variety of addressing notation, multiple targets/ranges, etc.

show current directory

Opens a file or URL in the user's preferred application.

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.

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

happened to find this not bad software to keep my files and folders safe! Even the free trial version has the fantastic functions to protect any private files from being seen by anyone except me. With it I can encrypt, hide or lock anything I want, amazin

I noticed some spammer posted an advertisement here for "not bad" encryption. Unfortunately, their software only runs under Microsoft Windows and fails to work from the commandline. My shell script improves upon those two aspects, with no loss in security, using the exact same "military-grade" encryption technology, which has the ultra-cool codename "ROT-13". For extra security, I recommend running ROT-13 twice.

Generate Random Text based on Length

Random text of length "$1" without the useless cat command.

get a random command

This command will show an random command. this is useful if you want to explore various random commands.

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)

All commands (14,042) 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…

All commands (14,042)

sorted by