group id

Bash Shell: Check File Exists or Not

by on April 20, 2012 · 2 comments

How do I test existence of a text file in bash running under Unix like operating systems?

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UNIX / Linux: Explain The Nine Permissions Bits On Files

by on February 24, 2009 · 1 comment

Can you completely explain the nine permissions bits on UNIX or Linux files?

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UNIX / Linux Command To Check Existing Groups and Users

by on June 27, 2008 · 15 comments

How do I check the existing Linux / UNIX users and groups under Linux / UNIX operating system?

{ 15 comments }

Remove Linux User From a Secondary Group ( Supplementary Groups )

by on March 3, 2008 · 18 comments

Q. User tom is a member of a group called sales and printer. I’d like to remove tom from a group called printer without editing any user configuration text files stored at /etc/ directory?

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Understanding /etc/group File

by on February 25, 2006 · 21 comments

Can you explain me the format of /etc/group user group file under Linux / UNIX operating systems?

{ 21 comments }

Understanding /etc/passwd File Format

by on February 22, 2006 · 79 comments

Q. Can you explain /etc/passwd file format for Linux and UNIX operating systems?

{ 79 comments }