ssh

[Shivkumar]

Hi,

I want to execute a shell script on remote server from a source server. However, the script should execute on the target machine directory only if the contents in the target directory changes.

How to accomplish this ?

Thanks,
Shiv

[skt_skt]

You can look for files with the current date/previous date time stamps(depending on when you want to check; like before 12AM or after 12AM)

[skt_skt]

ssh -n hostname "command"

[James R. Ferguson · Accepted solution]

Hi Shiv:

Your script (on the target server) should simply exit if when run the directory it examines hasn't changed since the last time it interrogated it.

To accomplish something like this, you capture the last modification time of the target directory as file metadata. Then when you script runs, compare the modification time of the target directory to the reference file's timestamp.

To storing and comparing file timestamps use:

# touch -mr ref_file target

Compare the reference file and target directory ages with the '-ot' or '-nt' file test operators. See the manpages for 'touch' and for 'sh-posix' for more details.

Regards!

...JRF...