What are metacharacters in bash? A metacharacter is a space , tab , newline , or one of the following characters: ‘ | ‘, ‘ & ‘, ‘ ; ‘, ‘ ( ‘, ‘ ) ‘, ‘ < ‘, or ‘ > ‘. A word consisting solely of letters, numbers, and underscores, and beginning with a letter or underscore. Name s are used as shell variable and function names.
What are the various types of shell metacharacters?
- Shell metacharacters on Linux. You can extend each of those commands through the use of metacharacters.
- Pipe | Say that I want to know all the instances of Firefox running on my system.
- Output redirection > Another favorite metacharacter is the output redirection > .
- Asterisk *
- Tilde ~
- Dollar symbol $
- Caret ^
What is quoting in Linux? Quoting is used to remove the special meaning of certain characters or words to the shell. Quoting can be used to disable special treatment for special characters, to prevent reserved words from being recognized as such, and to prevent parameter expansion.
How do I use metacharacters in Unix? The Metacharacters
Unix Shell provides various metacharacters which have special meaning while using them in any Shell Script and causes termination of a word unless quoted. A character may be quoted (i.e., made to stand for itself) by preceding it with a .