2 FAQ tagged "linux unix"

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Linux / UNIX Shell: Sort IP Address

Q. I’d like to sort a list of IP address stored in a text file. How do I sort by last notation or entire address under Linux or UNIX operating systems?
Howto: Linux Write protect a file
Q. How do I write protect a file under Linux? I’m using CentOS 5 server Linux operating system. I need prevent accidental changes to my files.
A. There are two ways to write protect a file under Linux.
Method #1: You can make file readonly by removing users’ write permission for a file. Under Linux and [...]