DZone Snippets: ssh code

Push your public key to a server

humblefrog (Steve) — Mon, 07 Jul 2008 11:42:26 GMT

If you've already created your ssh keys locally do this to push the public key to a server so you won't have to login to the server everytime you ssh or cap deploy.



 cat .ssh/id_rsa.pub | ssh deploy@myserver.com "cat >> .ssh/authorized_keys2"

server monitoring

shantanuo (shantanu oak) — Sat, 07 Jun 2008 14:43:51 GMT

# servers.sh
export MAILSERVERS="server1 server2 server3"
export WEBSERVERS="www1 www2 www3 www4"

#!/bin/bash
### Assess disk space on mail servers
source ./servers.sh
for i in ${MAILSERVERS} ; do
echo =========${i} =============
ssh root@${i} "df"
echo ============ =============
done

# min hour dom month dow command

grep “###” *

Copy Public Key To Host In One Line

timmorgan (Tim Morgan) — Wed, 19 Mar 2008 18:23:53 GMT



ssh username@host "echo `cat ~/.ssh/id_dsa.pub` >> ~/.ssh/authorized_keys"

Using Ruby to list directory names from a remote machine

jrobertson (James Robertson) — Tue, 25 Dec 2007 11:13:26 GMT

The first line of code executes an external shell command which retrieves directory names into an array. The second line of code displays each directory making sure to chop the '/', and '\n' from the name.



dir_listing = `ssh 192.168.1.10 'ls */ -d'`

dir_listing.each { |directory| puts directory.chop.chop }

Note: In this example ssh access to the remote machine does not prompt the user for a password as the hosts know each other. see ssh-keygen.

copy files using rsync and ssh

jrobertson (James Robertson) — Tue, 30 Oct 2007 13:03:36 GMT

source: http://www.mikerubel.org/computers/rsync_snapshots/#Abstract ; switches: -a = archive mode -e specifies the remote shell to use



rsync -a -e ssh source/ username@remotemachine.com:/path/to/destination/

Compress file in SSH

nothingless (Sasha) — Mon, 22 Oct 2007 11:38:10 GMT

The below will compress a file or folder in .tar.gz format in SSH.



tar -zcvf .tar.gz

Mount SSH using MacFUSE

willcodeforfoo () — Sun, 21 Jan 2007 23:14:06 GMT

This will also list the voume in the Finder, thanks to the volname option (I think)

mkdir -p ~/mnts/formandfx

sshfs kmarsh@formandfx.com: ~/mnts/formandfx -oping_diskarb,volname=formandfx

Connecting to a local database on a remote machine

whomwah (Duncan Robertson) — Tue, 12 Dec 2006 21:10:46 GMT

I had a MySQL instance on a remote server that had only local access. I wanted to connect to that database via my local copy of CocoaMysql. Using ssh portforwarding you can do it like this:



ssh -N -L :127.0.0.1:3306 remote_machine

so you can now open CocoaMysql and connect to localhost, bla, bla but if you use the assigned above you should see your remote database.

ssh and scp without typing a password each time

nevadalife (nevada) — Sat, 23 Sep 2006 18:33:56 GMT

* You can create and exchange ssh keys to avoid repeatedly typing your password.


Source:      ssh-keygen -t dsa                                     Type this once per log-in session

Source:      Now copy the .ssh/id_dsa.pub file to .

Source:      scp .ssh/id_dsa.pub userid@:tempid        we've renamed it tempid.

Destination: cat tempid >> .ssh/authorized_keys                     

add the contents of tempid to .ssh/authorized_keys.

Destination: rm tempid.

SSH Key Pairs Stuff

jnunemaker () — Sun, 27 Aug 2006 22:47:31 GMT

//allows for copying of ssh keys



ssh-keygen -t dsa

ssh user@host 'cat >> .ssh/authorizedkeys' < .ssh/id_dsa.pub