Definition: SUID (set user ID): The SUID permission causes a script to run as the user who is the owner of the script, rather than the user who started it. It is normally considered extremely bad practice to run a program in this way as it can pose many security problems. Later versions of the Linux kernel will even prohibit the running of shell scripts that have this attribute set.
"SUID (set user ID)"
By Juergen Haas, About.com
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