Describe of Unix Operating System .
The Linux shell commands are ways or instructions through which you can instruct your system to do some action. Commands are executed in the command line. Sample syntax of :…
What is a Directory A directory is like as a folder like windows. Linux directory is a table which contains all its files Inode number and connect it to the…
An Inode number is a uniquely existing number for all the files in Linux and all Unix type systems. If a file is create on a system, a file name…
Every Linux and Unix filesystem has many hard links and symbolic links. Every link is a connectivity between the filename and the actual data byte in the disk space of…
Sticky Bit on Directory The Linux or Unix file permission is so much important thing of Linux and Unix system. Every Linux files can be protect in a directory from…
The Octal permissions can also be set for the groups. Here : To set, r octal will be 4. w octal will be 2. x octal will be 1. File…
rename command is mostly used to rename multiple files. The tool searches for a given string in filenames and renames that file with the given new string. Sample syntax of…
grep command is used to search for string in a source. The source can be piped to it. Or it can read a file as source. Linux grep command can…
The Unix and Linux regular expression is also call regex or regexp. It is a very powerful tool in Linux. Regular expression is a pattern for a matching string that…
I/O means Input/Output. Redirection can be define as changing the way from where commands read input to where commands sends output. Redirections, meta characters are use. Redirection can be into…