63 lines
2.1 KiB
Markdown
63 lines
2.1 KiB
Markdown
# bash
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- [bash](#bash)
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- [shortcuts](#shortcuts)
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- [list of shortcuts](#list-of-shortcuts)
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- [unbind shortcuts](#unbind-shortcuts)
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- [tips and tricks](#tips-and-tricks)
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- [multitarget paths](#multitarget-paths)
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## shortcuts
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### list of shortcuts
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| Shortcut | Action |
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| :--------- | :----- |
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| ctrl+a | go to the start of the line |
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| ctrl+e | go to the end of the line |
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| ctrl+b | move one character backwards |
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| ctrl+f | move one character forwards |
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| alt+b | move one word backwards |
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| alt+f | move one word forwards |
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| **ctrl+w** | **delete to last white space** |
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| alt+? | show completion options |
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| **ctrl+r** | **search command history backwards** |
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| ctrl+g | exit history search |
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| ctrl+p | previous command in history |
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| ctrl+n | next command in history |
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| ctrl+o | run command and re-enter it |
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| ctrl+l | clear screen |
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| ctrl+s | suppress output to screen |
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| ctrl+q | resume output to screen |
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| ctrl+c | terminate command |
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| ctrl+z | suspend current command (resume with `fg`) |
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| **ctrl+d** | **exit shell** |
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### unbind shortcuts
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bash shortcuts can be disabled with the following command in `.bashrc`/`.bash_profile`:
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```bash
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bind -r "<shortcut-to-unbind>"
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```
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Example:
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```bash
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bind -r "\C-h"
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```
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`\C` is CTRL, `\M` is ALT
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## tips and tricks
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### multitarget paths
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Bash allows for variable expansion in paths. This can be useful, for example when copying multiple files from a directory. Instead of typing out the path multiple times, one can use '{<>,<>}' to specify multiple targets:
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```bash
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# without multitarget expansion
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cp foo/bar/moo.wav foo/bar/bark.wav foo/
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# with multitarget expansion
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cp foo/bar/{moo.wav,bark.wav} foo/
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# or even
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cp foo/bar/{moo,bark}.wav foo/
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```
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Multitarget expansion also works in the middle of a path as seen in the third command example above.
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> Use only ',' to separate targets and **no whitespace** as that would make a new argument.
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> The expansion makes a new argument for each entry inside the braces, so **copy to several targets does not work.**
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