Automating The Semi-Automatic 'rdate'

• The most crude form of time synchronization will mean putting an 'rdate -s' command in a cron job.
• How often to run this job? sometimes once a day will suffice.
• If you need a more accurate clock (e.g. your machine's clock runs off quickly), you may want to run 'rdate' more often.
• For some kind of operations this will not suffice (e.g. compiling source code that resides on an NFS server, which is edited via another machine - 'make' will not like even tiny time mismatches).

Originally written by guy keren