#Ssh shell script example how to
#Ssh shell script example code
#Ssh shell script example password

For details see console/scripting command-line parameters.įor automation, commands can be read from a script file specified by /script switch, passed from the command-line using the /command switch, or read from standard input of.

#Ssh shell script example code

I have written below piece of code in shell script which collects the lst of hosts and prints a SUMMARY with success and failed list of hosts.Enter the console/scripting mode by using or /console command-line parameter with winscp.exe.

Now you can use -o and -e as an option to analyse this but this would require little scripting. So if you were running a shell script with PSSH then you may not know out of 10 hosts which ones were successful and which one failed.ĪLSO READ: 6 commands to check and list active SSH connections in Linux Now with PSSH one problem I faced was when we use this tool in scripting, we get a consolidated EXIT STATUS but we do not have host specific exits status by default. Get list of hosts with SUCCESS and FAILED exit status To pass multiple SSHD argument # /bin/pssh -i -o /tmp/out/ -e /tmp/err/ -H '10.43.138.2 10.43.138.3 10.43.138.9' -l root -x '-q -o StrictHostKe圜hecking=no -o GSSAPIAuthentication=no -o PreferredAuthentications=publickey -o PubkeyAuthentication=yes' dateĨ. While /tmp/out is empty since there was no STDOUT for this operation on any of the host # ll /tmp/out/ 19:48:19 10.43.138.9 Exited with error code 127Īs expected we have received an EXIT CODE other than and now if we check /tmp/err then we see the same is captured for every host. So this means our PSSH will throw error # /bin/pssh -i -o /tmp/out/ -e /tmp/err/ -H '10.43.138.2 10.43.138.3 10.43.138.9' -l root -x '-q -o StrictHostKe圜hecking=no -o GSSAPIAuthentication=no -o PreferredAuthentications=publickey -o PubkeyAuthentication=yes' datet Here I am trying to run a command 'datet' which does not exists. So for the demo let me try to get a negative output. # /bin/pssh -i -o /tmp/out/ -e /tmp/err/ -H '10.43.138.2 10.43.138.3 10.43.138.9' -l root dateīut since the EXIT STATUS for all the commands were SUCCESS, the STDERR content is NULL. Next check /tmp/out to get the STDOUT result. The number is a counter that is incremented each time for hosts that are specified more than once. Filenames are of the form where the user and port are only included for hosts that explicitly specify them. Using ' -o' or ' -outdir' argument you can save standard output to files in the given directory.

#Ssh shell script example password

Warning: do not enter your password if anyone else has superuser However, be aware that a root user on your system could potentially intercept the password. The password is transferred in a fairly secure manner (e.g., it will not show up in argument lists).

The password may be used for either to unlock a key or for password authentication. Using ' -A' the tool will prompt for a password and pass it to ssh. Since we have enabled password less communication between our hosts, the tool does not prompts for password. Use ' -i' to display standard output and standard error as each host completes.ĪLSO READ: Create man page in Linux with examples (sample man page template) 4. You may have observed that for both the above examples, the EXIT STATUS was SUCCESS but yet the tool never printed any output on the screen. If you only have few hosts list on which you wish to execute certain commands, then you can manually pass the info # /bin/pssh -H '10.43.138.2 10.43.138.3 10.43.138.9' -l root date 19:29:01 19:29:01 19:29:01 as you see the tool was successfully able to connect all the provided hosts and the EXIT STATUS for all the hosts was SUCCESS. # cat we will call PSSH for all the hosts from this file to execute date command. You can create a file with list of hosts which can be used as an input for PSSH.

#Ssh shell script example how to

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