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Question...

Question...

eastoncheastonch Member
edited July 2012 in General

Hey there;

I was looking into making SSH access slightly easier between some VPS's I have, and instead of having a hostname of chrisvps1.chriseaston.info or xxx.xxx.xxx.xxx; Is there a simple way of just having server 1 be able to connect to server 2 by just saying "ssh root@server2" instead of an IP or long hostname?

I might be missing something here; help?

Comments

  • MrAndroidMrAndroid Member
    edited July 2012

    Yes

    Add it to /etc/hosts

    xxx.xxx.xxx.xxx server2

    Daniel.

  • netomxnetomx Member

    I thin you can put it on /etc/hosts

  • eastoncheastonch Member
    edited July 2012

    oh lol.

    I feel like such a fool now :']

  • u4iau4ia Member

    or just set up an alias in .bashrc

    alias ssh-server1='ssh -p 1234 [email protected]'

  • Oh, that's even better, as in, .bashrc in ~/.bashrc ?

    Since most of my servers are operating on random ports.

  • u4iau4ia Member

    @eastonch said: ~/.bashrc

    exactly

  • Wow.

    So I can also use aliases for other things too, like I could setup one which does a certain long command like "io" could then do a "dd" test?

  • Use an SSH config file under ~/.ssh/

    Host *
    IdentitiesOnly yes
    Compression yes
    ServerAliveInterval 60
    
    # sub.domain.tld
    
    Host shortname
    Hostname sub.domain.tld
    Port 12345
    User username
    IdentityFile ~/.ssh/[email protected]

    'shortname' will appear in your SSH tab list.

    I use separate keys for various servers so it suits me to use 'IdentitiesOnly' but you can always omit it (including the 'IdentityFile' directive)

  • u4iau4ia Member
    edited July 2012

    @eastonch said: like "io" could then do a "dd" test?

    yes; alias io='dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync && rm test'

    alias has a lot of uses,for example i have an alias set for gst='git status', it's great for those often typed commands :)

  • effectively speaking @u4ia I could do alias rsync-chris='rsync --verbose --progress --compress --rsh='ssh -p xxx' /home/chris/http/hosts/chriseaston.info/* 128mb:/home/backup/chriseaston.info/' and that would effectively backup my /chriseaston.info/ folder and xfer it to my other server? just by typing "rsync-chris"?

    Seems impossibruuu!

  • No, you need to escape some stuff

    I think it has to be alias rsync-chris='rsync --verbose --progress --compress --rsh=\'ssh -p xxx\' /home/chris/http/hosts/chriseaston.info/* 128mb:/home/backup/chriseaston.info/' And maybe one more \ before the *

    President Of Operations/CEO/CFO/CTO/COO of my account
    image

    Thanked by 1u4ia
  • Why would you have to escape things? @gsrdgrdghd

  • http://en.wikipedia.org/wiki/Escape_character#Programming_and_data_formats

    In this example bash would interpret the first ' (the one after --rsh=) as the matching ' that ends your alias.

    President Of Operations/CEO/CFO/CTO/COO of my account
    image

  • Ooooh... Right, I see lol! Thanks for that mate.

  • u4iau4ia Member

    @eastonch said: Seems impossibruuu!

    Nothing is impossibruuu!

  • efballefball Member

    add chriseaston.info to the search path in /etc/resolv.conf then you don't have to add individual hosts to the hosts file.

  • Oh, so I can just then do my128 since it's a subdomain of chriseaston.info?

  • sleddogsleddog Member
    edited July 2012

    There's always Bash...

    #!/bin/bash
    # Filename: ssh2.sh
    if [ -z "$1" ]; then
        echo "Usage: ssh2 hostname [port]"
        exit
    fi
    SERV="$1.chriseaston.info"
    PORT="22"
    if [ -n "$2" ]; then
        PORT=$2
    fi
    ssh -p $PORT -l root -i /path/to/mykey $SERV
    exit 0

    Set an alias... alias ssh2="/path/to/ssh2.sh"

    Try it...

    [me@home] ssh2 vps1

    This way you don't have to keep modifying your hosts file or your aliases every time you get another vps :)

    Thanked by 1Victor
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