Execute a list of commands from an ArrayList using JSch exec in Java

Question

Using JSch \"exec\" channel, I connect to a remote server and execute a command. What I can\'t do is to execute a list of commands stored in ArrayList. I use fo

Answer 1

You cannot call the setCommand multiple times. The "exec" channel can run a single "command" only.

But on most systems/shells, the "command" can actually include multiple commands.

A syntax will depend on your system/shell. Semicolons work usually:

((ChannelExec)channel).setCommand("hostname ; df -l");

Some servers/shells also allow newline.

((ChannelExec)channel).setCommand("hostname\ndf -l");

On *nix servers, you can also use && to make the following commands be executed only when the previous commands succeeded:

((ChannelExec)channel).setCommand("hostname && df -l");

See also Multiple commands through JSch shell.

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Another option is to open a new channel for each command. Note that you can have multiple channels over a single SSH session. You do not have to reconnect for each channel/command.