This article describes how to convert a dv video (raw) to mpeg4 video with mp3 audio (avi). Step 1: install mencoder Make sure mplayer is installed on your system.# rpm -qa | grep mplayer
mplayer [ ... ]

using lockfiles in shell scripts (BASH) If you want to be 100% sure that only 1 process accesses a resource at the same time, you can use the command "lockfile". Lockfile creates a semaphore file [ ... ]