Commands tagged ssh (190)

  • Get a free shell account on a community server

    Bash process substitution which curls the website 'hashbang.sh' and executes the shell script embedded in the page. This is obviously not the most secure way to run something like this, and we will scold you if you try. The smarter way would be: Download locally over SSL > curl https://hashbang.sh >> hashbang.sh Verify integrty with GPG (If available) > gpg --recv-keys 0xD2C4C74D8FAA96F5 > gpg --verify hashbang.sh Inspect source code > less hashbang.sh Run > chmod +x hashbang.sh > ./hashbang.sh


    5
    sh <(curl hashbang.sh)
    lrvick · 2015-03-15 21:02:01 16
  • Synchronize date and time with a server over ssh

    Set Remote Server Date using Local Server Time (push) Show Sample Output


    5
    ssh user@server sudo date -s @`( date -u +"%s" )`
    daryltucker · 2015-03-26 20:25:23 11
  • Execute a sudo command remotely, without displaying the password

    The ssh command alone will execute the sudo command remotely, but the password will be visible in the terminal as you type it. The two stty commands disable the terminal from echoing the password back to you, which makes the remote sudo act as it does locally.


    4
    stty -echo; ssh -t HOSTNAME "sudo some_command"; stty echo
    jmcantrell · 2009-03-04 19:44:36 12
  • ensure your ssh tunnel will always be up (add in crontab)

    I find it ugly & sexy at the same time isn't it ?


    4
    [[ $(COLUMNS=200 ps faux | awk '/grep/ {next} /ssh -N -R 4444/ {i++} END {print i}') ]] || nohup ssh -N -R 4444:localhost:22 user@relay &
    j0rn · 2009-03-31 09:39:59 10
  • from the console, start a second X server

    This starts a very basic X session, with just a simple xterm. You can use this xterm to launch your preferred distant session. ssh -X john@otherbox gnome-session Try also startkde or fluxbox or xfce4-session. To switch between your two X servers, use CTRL+ALT+F7 and CTRL+ALT+F8.


    4
    xinit -- :1
    flux · 2009-07-31 23:42:28 4
  • scp a good script from host A which has no public access to host C, but with a hop by host B

    middlehost allows ssh access from where you are but not securehost. Use nice ssh piping to simulate scp through A => B => C setting up the shell function if left as an exercise for the reader. ;-) Agent forwarding should avoid password typing.


    4
    cat nicescript |ssh middlehost "cat | ssh -a root@securehost 'cat > nicescript'"
    syladmin · 2009-08-25 08:11:12 7
  • How to run a command on a list of remote servers read from a file

    dsh - Distributed shell, or dancer?s shell ;-) you can put your servers into /etc/dsh/machines.list than you don't have to serperate them by commata or group them in different files and only run commands for this groups dsh -M -c -a -- "apt-get update" Show Sample Output


    4
    dsh -M -c -f servers -- "command HERE"
    foob4r · 2009-08-31 12:08:38 3
  • Get ssh server fingerprints

    Get your server's fingerprints to give to users to verify when they ssh in. Publickey locations may vary by distro. Fingerprints should be provided out-of-band. Show Sample Output


    4
    ssh-keygen -l -f /etc/ssh/ssh_host_rsa_key.pub && ssh-keygen -l -f /etc/ssh/ssh_host_dsa_key.pub
    Mikelifeguard · 2009-10-26 17:52:41 4
  • Start another instance of X via SSH


    4
    startx -- /usr/X11R6/bin/Xnest :5 -geometry 800x600
    ivanatora · 2010-02-26 11:02:27 5
  • ssh: change directory while connecting

    Useful to create an alias that sends you right in the directory you want : alias server-etc="ssh -t server 'cd /etc && $SHELL'"


    4
    ssh -t server 'cd /etc && $SHELL'
    dooblem · 2010-04-02 19:34:09 6
  • Debug SSH at the Maximum Verbosity Level

    When debugging an ssh connection either to optimize your settings ie compression, ciphers, or more commonly for debugging an issue connecting, this alias comes in real handy as it's not easy to remember the '-o LogLevel=DEBUG3' argument, which adds a boost of debugging info not available with -vvv alone. Especially useful are the FD info, and the setup negotiation to create a cleaner, faster connection. Show Sample Output


    4
    alias sshv='ssh -vvv -o LogLevel=DEBUG3'
    AskApache · 2010-10-30 11:23:52 4
  • SSH tunneling self-connection

    - port 8080 on localhost will be a SOCKSv5 proxy - at localhost:localport1 you will be connected to the external source server1:remoteport1 and at bind_address2:localport2 to server2:remoteport2 - you will be using only IPv4 and arcfour/blowfish-cbc, in order to speed up the tunnel - if you lose the connection, autossh will resume it at soon as possible - the tunnel is here a background process, wiithout any terminal window open


    4
    autossh -M 0 -p 22 -C4c arcfour,blowfish-cbc -NfD 8080 -2 -L localport1:server1:remoteport1 -L bind_address2:localport2:server2:remoteport2 user@sshserver
    dddddsadasdasd · 2010-11-13 23:49:09 4
  • Copy your ssh public key to a server from a machine that doesn't have ssh-copy-id

    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.


    4
    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)"
    tamouse · 2011-09-30 07:39:24 18
  • SSH Auto-login with password

    You need to install "sshpass" for this to work. apt-get install sshpass


    4
    sshpass -p "YOUR_PASSWORD" ssh -o StrictHostKeyChecking=no YOUR_USERNAME@SOME_SITE.COM
    o0110o · 2013-05-24 14:33:38 12
  • Do command when logged in from certain ips using ssh

    Place in ~/.bashrc If you login to a ssh server from different ips, sometimes you want to do something specific for each. e.g., quickly go into screen -x session from a phone, but not your desktop.


    4
    if [ "${SSH_CLIENT%% *}" == "ipaddr" ]; then command; fi
    snipertyler · 2015-01-13 22:09:38 10
  • Get the version of sshd on a remote system

    I used this to confirm an upgrade to an SSH daemon was successful Show Sample Output


    3
    ssh -vN hostname 2>&1 | grep "remote software version"
    sud0er · 2009-03-31 18:28:41 5
  • Paste OS X clipboard contents to a file on a remote machine

    Redirects the contents of your clipboard through a pipe, to a remote machine via SSH.


    3
    pbpaste | ssh user@hostname 'cat > ~/my_new_file.txt'
    mikedamage · 2009-07-14 16:32:03 3
  • analyze traffic remotely over ssh w/ wireshark

    Please check out my blog article on this for more detail. http://jdubb.net/blog/2009/08/07/monitor-wireshark-capture-real-time-on-remote-host-via-ssh/


    3
    mkfifo /tmp/fifo; ssh-keygen; ssh-copyid root@remotehostaddress; sudo ssh root@remotehost "tshark -i eth1 -f 'not tcp port 22' -w -" > /tmp/fifo &; sudo wireshark -k -i /tmp/fifo;
    Code_Bleu · 2010-01-05 14:40:06 3
  • improve copy file over ssh showing progress

    You set the file/dirname transfer variable, in the end point you set the path destination, this command uses pipe view to show progress, compress the file outut and takes account to change the ssh cipher. Support dirnames with spaces. Merged ideas and comments by http://www.commandlinefu.com/commands/view/4379/copy-working-directory-and-compress-it-on-the-fly-while-showing-progress and http://www.commandlinefu.com/commands/view/3177/move-a-lot-of-files-over-ssh Show Sample Output


    3
    file='path to file'; tar -cf - "$file" | pv -s $(du -sb "$file" | awk '{print $1}') | gzip -c | ssh -c blowfish user@host tar -zxf - -C /opt/games
    starchox · 2010-01-19 16:02:45 37
  • Start a SOCKS proxy to avoid a restrictive firewall

    You may go to Internet by means of your home ssh server. You must configure your local proxy to send traffic through the proxy. Many programs allows that: firefox, pidgin, skype, gnome, etc. Your home ssh server must listen in any of the ports permitted by your enterprise firewall. That usually includes 80 and 443. Show Sample Output


    3
    autossh -N -D localhost:1080 myhome.example.net -p 443
    prayer · 2010-05-22 19:52:30 5
  • run command on a group of nodes in parallel redirecting outputs

    Do the same as pssh, just in shell syntax. Put your hosts in hostlist, one per line. Command outputs are gathered in output and error directories.


    3
    xargs -n1 -P100 -I{} sh -c 'ssh {} uptime >output/{} 2>error/{}' <hostlist
    dooblem · 2010-08-20 11:03:11 3
  • send file to remote machine and unzip using ssh

    This version transfers gzipped data which is unzipped as it arrives at the remote host.


    3
    ssh user@host 'gunzip - > file' < file.gz
    putnamhill · 2010-09-20 14:04:47 3
  • Debug a remote php application (behind firewall) using ssh tunnel for XDEBUG port 9000

    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: http://code.google.com/p/spectator/wiki/Installing


    3
    ssh -R 9000:localhost:9000 you@remote-php-web-server.com
    nadavkav · 2011-05-28 09:39:16 4
  • analyze traffic remotely over ssh w/ wireshark

    commandline for mac os x


    3
    ssh user@server.com sudo tcpdump -i eth0 -w - 'port 80'| /Applications/Wireshark.app/Contents/Resources/bin/wireshark -k -i -
    bkendinibilir · 2012-01-23 18:16:22 3
  • Remote execute command as sudoer via ssh

    Example: remote install an application(wine). sshpass -p 'mypssword' ssh -t mysshloginname@192.168.1.22 "echo 'mypassword' | sudo -S apt-get install wine" Tested on Ubuntu.


    3
    sshpass -p 'sshpssword' ssh -t <sshuser>@<remotehost> "echo <sudopassword> | sudo -S <command>"
    dynaguy · 2012-09-13 20:27:13 9
  •  < 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

Stoppable sleep
A nice way to interrupt a sleep with a signal.

Copy an element from the previous command
'n' is a non-negative integer. Using 0 will expand to the name of the previous command.

Annoying PROMPT_COMMAND animation
unset PROMPT_COMMAND to disable.

Use /dev/full to test language I/O-failsafety
The Linux /dev/full file simulates a "disk full" condition, and can be used to verify how a program handles this situation. In particular, several programming language implementations do not print error diagnostics (nor exit with error status) when I/O errors like this occur, unless the programmer has taken additional steps. That is, simple code in these languages does not fail safely. In addition to Perl, C, C++, Tcl, and Lua (for some functions) also appear not to fail safely.

Remove color codes (special characters) with sed
Removes ANSI color and end of line codes to the [{attr1};...;{attrn}m format.

Terminal Escape Code Zen - Strace and Tput
Depending on the TERM, the terminfo version, ncurses version, etc.. you may be using a varied assortment of terminal escape codes. With this command you can easily find out exactly what is going on.. This is terminal escape zen! $ ( 2>&2 strace -f -F -e write -s 1000 sh -c 'echo -e "initc\nis2\ncnorm\nrmso\nsgr0" | tput -S' 2>&1 ) | grep -o '"\\[^"]*"' --color=always "\33]4;%p1%d;rgb:%p2%{255}%*%{1000}%/%2.2X/%p3%{255}%*%{1000}%/%2.2X/%p4%{255}%*%{1000}%/%2.2X\33\\\33[!p\33[?3;4l\33[4l\33>\33[?12l\33[?25h\33[27m\33(B\33[m" Lets say you want to find out what you need to echo in order to get the text to blink.. $ echo -e "`tput blink`This will blink`tput sgr0` This wont" Now you can use this function instead of calling tput (tput is much smarter for portable code because it works differently depending on the current TERM, and tput -T anyterm works too.) to turn that echo into a much faster executing code. tput queries files, opens files, etc.. but echo is very strait and narrow. So now you can do this: $ echo -e "\33[5mThis will blink\33(B\33[m This wont" More at http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

Show a curses based menu selector
Not so much handy by itself, but very nice in shell scripts. This makes you a handy ncurses based checklist. Much like terminal installers, just use the arrow keys and hit 'Space' to adjust the selections. Returns all selected tags as strings, with no newline at the end. So, your output will be something like: "one" "two" "three" "four" "etc" For those who prefer bash expansion over gratuitious typing: $ whiptail --checklist "Simple checkbox menu" 12 35 3 $(echo {one,two,three,four}" '' 0"} ) Things to note: The height must includes the outer border and padding: add 7 to however many items you want to show up at the same time. If the status is 1, it will be selected by default. anything else, will be deselected.

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" }

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

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" }

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: