Bash/bash-completion: Unterschied zwischen den Versionen
Keine Bearbeitungszusammenfassung |
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| Zeile 5: | Zeile 5: | ||
= Aktivierung = | = Aktivierung = | ||
== Aktivierung | == Aktivierung für alle Benutzer == | ||
/etc/bash.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 | ||
| Zeile 15: | Zeile 16: | ||
fi | fi | ||
== Aktivierung pro Benutzer == | |||
~/.bashrc | |||
== Aktivierung | |||
/ | |||
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 | ||
| Zeile 33: | Zeile 26: | ||
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. | * 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. | ||
| Zeile 42: | Zeile 38: | ||
== Anwendungen == | == Anwendungen == | ||
* 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 = | = Links = | ||
Version vom 26. September 2020, 08:33 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.
Anwendungen
- 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
Intern
- TODO
Weblinks
- TODO