Executes commands entered on standard input. Ends with EOF. Unlike
at, which executes commands at a specific time, batch executes commands one after another (waiting for each one to complete). This avoids the potentially high system load caused by running several background jobs at once. See also at.
batch is equivalent to issuing the command at -q b now.
Execute commands listed in
Send mail to user after job is completed (if an MTA such as sendmail is configured to run).
sortin > out