How to execute a remote command over ssh with arguments

Question

In my  bashrc I define a function which I can use on the command line later   function mycommand         ssh user 123 456 789 0 cd testdir   test sh   1      When using this command  just the cd command is executed on the remote host  the test sh command is executed on the local host  This is because the semicolon separates two different commands  the ssh command and the test sh command    I tried defining the function as follows  note the single quotes    function mycommand         ssh user 123 456 789 0  cd testdir   test sh   1       I tried to keep the cd command and the test sh command together  but the argument  1 is not resolved  independent of what I give to the function  It is always tried to execute a command    test sh  1   on the remote host    How do I properly define mycommand  so the script test sh is executed on the remote host after changing into the directory testdir  with the ability to pass on the argument given to mycommand to test sh

User · Answer

This is an example that works on the AWS Cloud  The scenario is that some machine that booted from autoscaling needs to perform some action on another server  passing the newly spawned instance DNS via SSH    Get the public DNS of the current machine  AWS specific  MY DNS  curl -s http   169 254 169 254 latest meta-data public-hostname    ssh       -o StrictHostKeyChecking no       -i    ssh id rsa       user remotehost example com    lt  lt  EOF cd    echo  Hey I was just SSHed by   MY DNS   run other commands   Newline is important before final EOF   EOF

User · Answer

I m using the following to execute commands on the remote from my local computer   ssh -i    ssh  GIT PRIVKEY user  IP  bash -s   lt  localpath script sh  arg1  arg2

User · Answer

Reviving an old thread  but this pretty clean approach was not listed   function mycommand         ssh user 123 456 789 0  lt  lt       cd testdir   test sh   1

User · Answer

Do it this way instead   function mycommand       ssh user 123 456 789 0  cd testdir   test sh    1        You still have to pass the whole command as a single string  yet in that single string you need to have  1 expanded before it is sent to ssh so you need to use    for it   Update  Another proper way to do this actually is to use printf  q to properly quote the argument  This would make the argument safe to parse even if it has spaces  single quotes  double quotes  or any other character that may have a special meaning to the shell   function mycommand       printf -v     q   1      ssh user 123 456 789 0  cd testdir   test sh           When declaring a function with function     is not necessary  Don t comment back about it just because you re a POSIXist

[linux] How to execute a remote command over ssh with arguments?

Examples related to linux

Examples related to bash

Examples related to ssh