tiyn/wiki
1
0
Fork 0
mirror of https://github.com/tiyn/wiki.git synced 2025-04-04 07:47:45 +02:00
Code Issues Projects Releases Wiki Activity

shell: added bracket expansions

Browse Source
This commit is contained in:
tiyn 2023-08-05 00:19:26 +02:00
parent db800ba416
commit 334984c91e
1 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
wiki/linux/shell.md
View File

@ -24,6 +24,29 @@ The following is a list of Unix shells that are POSIX compliant.
This section addresses various different functions by and actions that can be This section addresses various different functions by and actions that can be
taken with shell commands. taken with shell commands.
### Expansion
This section is based on the
[TLDP Bash guide for beginners](https://tldp.org/LDP/Bash-Beginners-Guide/html/sect_03_04.html).
Although it is centered on Bash it can also be used in other shells (Zsh) while being unsupported
by others (DASH).
In most shells curly braces can be used to expand a term.
Commands can be expanded like the following example.
```sh
echo sp{el,il,al}l
```
The previous command will expand to the following command.
```sh
echo spell spill spall
```
The example shows a brace expansions of depth `1`.
Using multiple curly brace pairs the depth can be increased as needed.
### For Loops ### For Loops
For loops can be especially useful when scripting. For loops can be especially useful when scripting.