This is the command pmlock that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
pmlock - simple file-based mutex
SYNOPSIS
$PCP_BINADM_DIR/pmlock [ -v ] file
DESCRIPTION
pmlock attempts to acquire an exclusive lock by creating file with a mode of 0.
The exit status is 0 for success, 1 for failure.
To release the lock, unlink file.
In the event of a failure, the -v option produces an explanatory message on stdout.
Use pmlock online using onworks.net services