Bash/bash-completion: Unterschied zwischen den Versionen
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'''bash-completion''' erweitert die Vervollständigung von Befehlszeilen mit Hilfe der TAB-Taste | |||
= Installation = | = Installation = | ||
apt install bash-completion | # '''apt install bash-completion''' | ||
= | = Aktivierung = | ||
== Aktivierung für alle Benutzer == | |||
'''/etc/bash.bashrc''' | |||
if ! shopt -oq posix; then | |||
if [ -f /usr/share/bash-completion/bash_completion ]; then | |||
. /usr/share/bash-completion/bash_completion | |||
elif [ -f /etc/bash_completion ]; then | |||
. /etc/bash_completion | |||
fi | |||
fi | |||
== | == Aktivierung pro Benutzer == | ||
'''~/.bashrc''' | |||
if ! shopt -oq posix; then | if ! shopt -oq posix; then | ||
if [ -f /usr/share/bash-completion/bash_completion ]; then | if [ -f /usr/share/bash-completion/bash_completion ]; then | ||
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fi | fi | ||
fi | fi | ||
To try it without logging out and back in, run: | |||
'''$ . ~/.bashrc''' | |||
* | |||
= Funktionsweise = | |||
* the . in front of /etc/bash_completion does not refer to the current directory, since it has spaces around it. | |||
* It instead makes the contents of the given file be evaluated in the currently running shell, instead of being executed in a new subshell. It is standardized here. | * It instead makes the contents of the given file be evaluated in the currently running shell, instead of being executed in a new subshell. It is standardized here. | ||
* In Bash, this . can be replaced by the command source, but this is not standardized by POSIX and is less portable so I tend to steer people away from using it. | * In Bash, this . can be replaced by the command source, but this is not standardized by POSIX and is less portable so I tend to steer people away from using it. | ||
| Zeile 34: | Zeile 35: | ||
* Incidentally, this behavior (not opening a sub-shell) is similar to the way DOS/Windows .BAT scripts work normally, changing the state of the shell they are run in. | * Incidentally, this behavior (not opening a sub-shell) is similar to the way DOS/Windows .BAT scripts work normally, changing the state of the shell they are run in. | ||
* This is why if you cd into a different path in a shell script, you won't be in that path when the script exits like you would be in a .BAT. | * This is why if you cd into a different path in a shell script, you won't be in that path when the script exits like you would be in a .BAT. | ||
== Anwendung == | |||
* Then try to use tab-completion | |||
* That dot and space at the beginning (.) is the same as using the source keyword in bash, but is more portable. | |||
* If you want it to work when su'd into the root account, do the same thing in root's home directory (typically /root). | |||
= Links = | |||
== Dateien == | |||
== Man-Page == | |||
== Intern == | |||
== Weblinks == | |||
=Kontrollfragen= | |||
<div class="toccolours mw-collapsible mw-collapsed"> | |||
''Testfrage 1'' | |||
<div class="mw-collapsible-content">'''Antwort1'''</div> | |||
</div> | |||
<div class="toccolours mw-collapsible mw-collapsed"> | |||
''Testfrage 2'' | |||
<div class="mw-collapsible-content">'''Antwort2'''</div> | |||
</div> | |||
<div class="toccolours mw-collapsible mw-collapsed"> | |||
''Testfrage 3'' | |||
<div class="mw-collapsible-content">'''Antwort3'''</div> | |||
</div> | |||
<div class="toccolours mw-collapsible mw-collapsed"> | |||
''Testfrage 4'' | |||
<div class="mw-collapsible-content">'''Antwort4'''</div> | |||
</div> | |||
<div class="toccolours mw-collapsible mw-collapsed"> | |||
''Testfrage 5'' | |||
<div class="mw-collapsible-content">'''Antwort5'''</div> | |||
</div> | |||
[[Kategorie:Bash/Konfiguration]] | |||
Aktuelle Version vom 6. November 2024, 12:33 Uhr
bash-completion erweitert die Vervollständigung von Befehlszeilen mit Hilfe der TAB-Taste
Installation
# apt install bash-completion
Aktivierung
Aktivierung für alle Benutzer
/etc/bash.bashrc
if ! shopt -oq posix; then
if [ -f /usr/share/bash-completion/bash_completion ]; then
. /usr/share/bash-completion/bash_completion
elif [ -f /etc/bash_completion ]; then
. /etc/bash_completion
fi
fi
Aktivierung pro Benutzer
~/.bashrc
if ! shopt -oq posix; then
if [ -f /usr/share/bash-completion/bash_completion ]; then
. /usr/share/bash-completion/bash_completion
elif [ -f /etc/bash_completion ]; then
. /etc/bash_completion
fi
fi
To try it without logging out and back in, run:
$ . ~/.bashrc
Funktionsweise
- the . in front of /etc/bash_completion does not refer to the current directory, since it has spaces around it.
- It instead makes the contents of the given file be evaluated in the currently running shell, instead of being executed in a new subshell. It is standardized here.
- In Bash, this . can be replaced by the command source, but this is not standardized by POSIX and is less portable so I tend to steer people away from using it.
- In this case, since it is specifically a program for extending bash, rather than something that needs to work in a bourne shell or ksh, you can feel free to substitute source for readability.
- Incidentally, this behavior (not opening a sub-shell) is similar to the way DOS/Windows .BAT scripts work normally, changing the state of the shell they are run in.
- This is why if you cd into a different path in a shell script, you won't be in that path when the script exits like you would be in a .BAT.
Anwendung
- Then try to use tab-completion
- That dot and space at the beginning (.) is the same as using the source keyword in bash, but is more portable.
- If you want it to work when su'd into the root account, do the same thing in root's home directory (typically /root).
Links
Dateien
Man-Page
Intern
Weblinks
Kontrollfragen
Testfrage 1
Antwort1
Testfrage 2
Antwort2
Testfrage 3
Antwort3
Testfrage 4
Antwort4
Testfrage 5
Antwort5