How to use SSH to run a shell script on a remote machine?
I have to run a shell script (windows/Linux) on a remote machine.
I have SSH configured on both machine A and B. My script is on machine A which will run some of my code on a remote machine, machine B.
The local and remote computers can be either Windows or Unix based system.
Is there a way to run do this using plink/ssh?
If Machine A is a Windows box, you can use Plink (part of PuTTY) with the -m parameter, and it will execute the local script on the remote server.
plink root@MachineB -m local_script.sh
If Machine A is a Unix-based system, you can use:
ssh root@MachineB 'bash -s' < local_script.sh
You shouldn't have to copy the script to the remote server to run it.
This is an old question, and Jason's answer works fine, but I would like to add this:
ssh user@host <<'ENDSSH'
#commands to run on remote host
ENDSSH
This can also be used with su and commands which require user input. (note the ' escaped heredoc)
Edit: Since this answer keeps getting bits of traffic, i would add even more info to this wonderful use of heredoc:
You can nest commands with this syntax, and thats the only way nesting seems to work (in a sane way)
ssh user@host <<'ENDSSH'
#commands to run on remote host
ssh user@host2 <<'END2'
# Another bunch of commands on another host
wall <<'ENDWALL'
Error: Out of cheese
ENDWALL
ftp ftp.secureftp-test.com <<'ENDFTP'
test
test
ls
ENDFTP
END2
ENDSSH
You can actually have a conversation with some services like telnet, ftp, etc. But remember that heredoc just sends the stdin as text, it doesn't wait for response between lines
Edit: I just found out that you can indent the insides if you use <<-END !
ssh user@host <<-'ENDSSH'
#commands to run on remote host
ssh user@host2 <<-'END2'
# Another bunch of commands on another host
wall <<-'ENDWALL'
Error: Out of cheese
ENDWALL
ftp ftp.secureftp-test.com <<-'ENDFTP'
test
test
ls
ENDFTP
END2
ENDSSH
(I think this should work)
Also see http://tldp.org/LDP/abs/html/here-docs.html
Also, don't forget to escape variables if you want to pick them up from the destination host.
This has caught me out in the past.
For example:
user@host> ssh user2@host2 "echo $HOME"
prints out /home/user2
while
user@host> ssh user2@host2 "echo $HOME"
prints out /home/user
Another example:
user@host> ssh user2@host2 "echo hello world | awk '{print $1}'"
prints out "hello" correctly.
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