A double-dash in a shell command signals the end of options and disables further option processing. … This command outputs all occurrences of the string hello from the specified file.
What do double dashes mean?
Double dashes are used instead of commas (or parentheses) to interrupt a sentence. … It is often said that we use dashes to signal that something crucial is being added to a sentence and use parentheses to signal that the interruption is relatively unimportant (e.g., to give dates or citations or examples).
What does double hyphen mean in bash?
5. 807. More precisely, a double dash ( — ) is used in most Bash built-in commands and many other commands to signify the end of command options, after which only positional arguments are accepted.
Why hyphen is used in Linux?
We all know that when we use hyphen after the command cd , we will change to the previous working directory; and when we use hyphen after the input redirection << , the bash will ignore the leading tabs (but not spaces) in the here script.
What are two dashes called?
There are three forms of dashes: em, en, and the double hyphen. The most common types of dashes are the en dash (–) and the em dash (—). A good way to remember the difference between these two dashes is to visualize the en dash as the length of the letter N and the em dash as the length of the letter M.
How do you use two dashes?
Two dashes can emphasize a modifier. Words or phrases that describe a noun can be set off with dashes if you wish to emphasize them. Example: The fairgrounds—cold and wet in the October rain—were deserted. Example: Nettie—her chin held high—walked out into the storm.
What does double — mean?
1 : having a twofold relation or character : dual. 2 : consisting of two usually combined members or parts an egg with a double yolk. 3a : being twice as great or as many double the number of expected applicants.
What is this called in Linux?
Basics of Linux Commands
| Symbol | Explanation |
|---|---|
| | | This is called “Piping“, which is the process of redirecting the output of one command to the input of another command. Very useful and common in Linux/Unix-like systems. |
| > | Take the output of a command and redirect it into a file (will overwrite the whole file). |
What does a dash mean in Linux?
Dash is an acronym for Debian Almquist shell (dash). It is a Unix and Linux shell which is much smaller than bash but still aiming at POSIX-compliancy. dash is a POSIX-compliant implementation of /bin/sh that aims to be as small as possible. … dash is the standard command interpreter for the Linux system.
Why do you use a single dash within a Git command rather than a double dash?
So, to summarize: Use a single hyphen for shorthand flags if it’s supported. Use a double-hyphen for long-hand flags if you remember the command name, or if there’s no alternative (like in –ignore-missing ).