linux execute command remotely

Question

how do I execute command script on a remote linux box  say I want to do service tomcat start on box b from box a

User · Answer

ssh user machine  bash -s   lt  local script sh   or you can just    ssh user machine  remote command to run

User · Answer

I think this article explains well   Running Commands on a Remote Linux   UNIX Host  Google is your best friend  -

User · Answer

I guess ssh is the best secured way for this  for example    ssh -OPTIONS -p SSH PORT user remote server  remote command1  remote command2  remote script sh      where the OPTIONS have to be deployed according to your specific needs  for example  binding to ipv4 only  and your remote command could be starting your tomcat daemon   Note  If you do not want to be prompt at every ssh run  please also have a look to ssh-agent  and optionally to keychain if your system allows it  Key is    to understand the ssh keys exchange process  Please take a careful look to ssh config  i e  the ssh client config file  and sshd config  i e  the ssh server config file   Configuration filenames depend on your system  anyway you ll find them somewhere like  etc sshd config  Ideally  pls do not run ssh as root obviously but as a specific user on both sides  servers and client   Some extra docs over the source project main pages    ssh and ssh-agent man ssh  http   www snailbook com index html https   help ubuntu com community SSH OpenSSH Configuring    keychain http   www gentoo org doc en keychain-guide xml an older tuto in French  by myself  -  but might be useful too   http   hornetbzz developpez com tutoriels debian ssh keychain

User · Answer

If you don t want to deal with security and want to make it as exposed  aka  convenient   as possible for short term  and or don t have ssh telnet or key generation on all your hosts  you can can hack a one-liner together with netcat   Write a command to your target computer s port over the network and it will run it   Then you can block access to that port to a few  trusted  users or wrap it in a script that only allows certain commands to run   And use a low privilege user     on the server  mkfifo  tmp netfifo  nc -lk 4201 0 lt  tmp netfifo   bash -e  amp  gt  tmp netfifo  This one liner reads whatever string you send into that port and pipes it into bash to be executed   stderr  amp  stdout are dumped back into netfifo and sent back to the connecting host via nc     on the client  To run a command remotely  echo  ls    nc HOST 4201

[linux] linux execute command remotely

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