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May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

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Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

Commands tagged ssh from sorted by
Terminal - Commands tagged ssh - 178 results
ssh-keygen -R $(dig +short host.domain.tld)
2012-01-19 15:08:50
User: atoponce
Functions: dig ssh ssh-keygen

Quick shortcut if you know the hostname and want to save yourself one step for looking up the IP address separately.

perl -p -i -e 's/.*\n//g if $.==2' ~/.ssh/known_hosts
ssh "gzip -c /tmp/backup.sql" |gunzip > backup.sql
2012-01-06 17:44:06
User: ultips
Functions: gunzip ssh

If you have servers on Wide Area Network (WAN), you may experience very long transfer rates due to limited bandwidth and latency.

To speed up you transfers you need to compress the data so you will have less to transfer.

So the solution is to use a compression tools like gzip or bzip or compress before and after the data transfer.

Using ssh "-C" option is not compatible with every ssh version (ssh2 for instance).

echo -e '#!/bin/bash\nssh [email protected] $0 "$@"' >> /usr/local/bin/ssh-rpc; chmod +x /usr/local/bin/ssh-rpc; ln -s hostname /usr/local/bin/ssh-rpc; hostname
2011-12-28 17:43:34
User: mechmind
Functions: chmod echo hostname ln
Tags: ssh rpc

It's useful mostly for your custom scripts, which running on specific host and tired on ssh'ing every time when you need one simple command (i use it for update remote apt repository, when new package have to be downloaded from another host).

Don't forget to set up authorization by keys, for maximum comfort.

ssh [email protected] "tar -zcf - /path/to/dir" > dir.tar.gz
2011-12-16 05:48:38
User: __
Functions: ssh
Tags: ssh tar gzip

This improves on #9892 by compressing the directory on the remote machine so that the amount of data transferred over the network is much smaller. The command uses ssh(1) to get to a remote host, uses tar(1) to archive and compress a remote directory, prints the result to STDOUT, which is written to a local file. In other words, we are archiving and compressing a remote directory to our local box.

ssh [email protected] "tar -czf - /path/to/dir" > dir.tar.gz
ssh [email protected] "tar -cf - /path/to/dir" | gzip > dir.tar.gz
2011-12-14 15:54:57
User: atoponce
Functions: gzip ssh
Tags: ssh tar gzip

The command uses ssh(1) to get to a remote host, uses tar(1) to archive a remote directory, prints the result to STDOUT, which is piped to gzip(1) to compress to a local file. In other words, we are archiving and compressing a remote directory to our local box.

sshostnew () {sed -i "$1d" $HOME/.ssh/known_hosts ; }
2011-11-07 10:33:04
User: _john
Tags: ssh sed

If you work in an environment, where some ssh hosts change regularly this might be handy...

cat /var/log/auth.log | grep -i "pam_unix(sshd:auth): authentication failure;" | cut -d' ' -f14,15 | cut -d= -f2 | sort | uniq
2011-10-25 04:58:09
User: JohnQUnknown
Functions: cat cut grep sort

This command shows a sorted list of the IP addresses from which there have been authentication errors via SSH (possible script kiddies trying to gain access to your server), it eliminates duplicates so it's easier to read, but you can remove the "uniq" command at the end, or even do a "uniq -c" to have a count of how many times each IP address shows in the log (the path to the log may vary from system to system)

rsync -P -e 'ssh -p PORT' SRC DEST
2011-10-13 08:59:07
User: vickio
Functions: rsync
Tags: ssh rsync

Transfer files with rsync over ssh on a non-standard port, showing a progress bar and resuming partial transfers.

multitail -l 'ssh machine1 "tail -f /var/log/apache2/error.log"' -l 'ssh machine2 "tail -f /var/log/apache2/error.log"'
2011-10-12 10:05:18

this way you have the multitail with all its options running on your own machine with the tails of the two remote machines inside :)

ssh <user>@<host> 'mkdir -m 700 ~/.ssh; echo ' $(< ~/.ssh/id_rsa.pub) ' >> ~/.ssh/authorized_keys ; chmod 600 ~/.ssh/authorized_keys'
2011-10-03 15:59:43
User: Halki
Functions: chmod echo ssh
Tags: ssh ksh

Creates the .ssh directory on the remote host with proper permissions, if it doesnt exist. Appends your public key to authorized_keys, and verifies it has proper permissions. (if it didnt exist it may have been created with undesireable permissions).

*Korn shell syntax, may or may not work with bash

cat ~/.ssh/id_rsa.pub | ssh <REMOTE> "(cat > tmp.pubkey ; mkdir -p .ssh ; touch .ssh/authorized_keys ; sed -i.bak -e '/$(awk '{print $NF}' ~/.ssh/id_rsa.pub)/d' .ssh/authorized_keys; cat tmp.pubkey >> .ssh/authorized_keys; rm tmp.pubkey)"
2011-09-30 07:39:24
User: tamouse
Functions: cat ssh
Tags: ssh awk

This one is a bit more robust -- the remote machine may not have an .ssh directory, and it may not have an authorized_keys file, but if it does already, and you want to replace your ssh public key for some reason, this will work in that case as well, without duplicating the entry.

ssh [email protected] tcpdump -iany -U -s0 -w - 'not port 22' | wireshark -k -i -
2011-09-13 21:10:40
User: dr3s
Functions: ssh tcpdump

analyze traffic remotely over ssh w/ wireshark

When using tcpdump, specify -U option to prevent buffering and -iany to see all interfaces.

sshmysql() { ssh -L 13306: -N $* & }
2011-09-01 10:21:55
Functions: ssh

Create a secure tunnelled connection for access to a remote MySQL database.

For example, connect with MySQL Workbench to [email protected]:13306.

date `ssh [email protected] date "+%y%m%d%H%M.%S"`
2011-08-30 22:32:14
User: wu
Functions: date
Tags: ssh ,NTP ,Date

Neat idea! This variation works on FreeBSD.

date --set="$(ssh [email protected] date)"
2011-08-30 20:03:06
User: splante
Functions: date
Tags: ssh ,NTP ,Date

Shorter, easier to remember version of cmd#7636

NTP is better, but there are situations where it can't be used. In those cases, you can do this to sync the local time to a server.

var=host ;while ! nc -zw 1 $var 22;do sleep 1; done ; ssh user@$var
complete -W "$(sed 's/;.*//;' /etc/hosts | awk ' /^[[:digit:]]/ {$1 = "";print tolower($0)}')" ssh
2011-06-20 03:54:45
User: daodennis

If you have a lot of hosts in /etc/hosts this would be very useful. Anyone have any more concise examples?

2011-06-17 18:29:59
User: xeor
Tags: ssh

SSH can be controlled trough an ~ escape sequence. Example, to terminate the current ssh connection, type a newline, then the ~ character, and last a . character.

This is useful eg when an ssh connection hangs after you reboot a machine and the connection hangs.

complete -W "$(echo `cat ~/.ssh/known_hosts | cut -f 1 -d ' ' | sed -e s/,.*//g | uniq | grep -v "\["`;)" ssh
while true; do date; ssh <YOUR HOST HERE> "echo" && echo "HOST UP" && break; sleep 60; done
ssh -R 9000:localhost:9000 [email protected]
2011-05-28 09:39:16
User: nadavkav
Functions: ssh

If you need to xdebug a remote php application, which is behind a firewall, and you have an ssh daemon running on that machine. you can redirect port 9000 on that machine over to your local machine from which you run your xdebug client (I am using phpStorm)

So, run this command on your local machine and start your local xdebug client, to start debugging.

more info:


apt-get install `ssh [email protected]_you_want_to_clone "dpkg -l | grep ii" | awk '{print $2}'`