?? remote.bash
字號:
#!/bin/bash# remote.bash: Using ssh.# This example by Michael Zick.# Used with permission.# Presumptions:# ------------# fd-2 isn't being captured ( '2>/dev/null' ).# ssh/sshd presumes stderr ('2') will display to user.## sshd is running on your machine.# For any 'standard' distribution, it probably is,#+ and without any funky ssh-keygen having been done.# Try ssh to your machine from the command line:## $ ssh $HOSTNAME# Without extra set-up you'll be asked for your password.# enter password# when done, $ exit## Did that work? If so, you're ready for more fun.# Try ssh to your machine as 'root':## $ ssh -l root $HOSTNAME# When asked for password, enter root's, not yours.# Last login: Tue Aug 10 20:25:49 2004 from localhost.localdomain# Enter 'exit' when done.# The above gives you an interactive shell.# It is possible for sshd to be set up in a 'single command' mode,#+ but that is beyond the scope of this example.# The only thing to note is that the following will work in#+ 'single command' mode.# A basic, write stdout (local) command.ls -l# Now the same basic command on a remote machine.# Pass a different 'USERNAME' 'HOSTNAME' if desired:USER=${USERNAME:-$(whoami)}HOST=${HOSTNAME:-$(hostname)}# Now excute the above command line on the remote host,#+ with all transmissions encrypted.ssh -l ${USER} ${HOST} " ls -l "# The expected result is a listing of your username's home#+ directory on the remote machine.# To see any difference, run this script from somewhere#+ other than your home directory.# In other words, the Bash command is passed as a quoted line#+ to the remote shell, which executes it on the remote machine.# In this case, sshd does ' bash -c "ls -l" ' on your behalf.# For information on topics such as not having to enter a#+ password/passphrase for every command line, see#+ man ssh#+ man ssh-keygen#+ man sshd_config.exit 0
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