Difference between revisions of "Bash history"
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| − | Bash | + | [[Bash]] command history feature allows to recall, edit and rerun previous commands. Also allows commands to be saved using the <code>history -a</code> command<ref>https://unix.stackexchange.com/questions/145250/where-is-bashs-history-stored</ref><ref>https://www.gnu.org/software/bash/manual/bash.html#Bash-History-Builtins</ref>. |
Variables to control Bash History: | Variables to control Bash History: | ||
| − | * HISTFILE<ref><https://www.gnu.org/software/bash/manual/bash.html#index-HISTFILE</ref>: The default value is ~/.bash_history | + | * [[HISTSIZE]] (<code>[[echo]] $HISTSIZE</code>) |
| + | * [[HISTFILE]]<ref><https://www.gnu.org/software/bash/manual/bash.html#index-HISTFILE</ref>: The default value is <code>~/[[.bash_history]]</code> | ||
* HISTFILESIZE | * HISTFILESIZE | ||
| − | * HISTTIMEFORMAT<ref>https://www.gnu.org/software/bash/manual/bash.html#index-HISTTIMEFORMAT</ref> | + | * [[HISTTIMEFORMAT]] <ref>https://www.gnu.org/software/bash/manual/bash.html#index-HISTTIMEFORMAT</ref> |
| − | + | == Usage == | |
| − | * | + | * Save every executed command to: <code>[[~/.bash_history]]</code> |
| − | :<code>export PROMPT_COMMAND='history -a'</code> | + | :<code>[[export]] [[PROMPT_COMMAND]]='[[history -a]]'</code> |
* Advanced examples: | * Advanced examples: | ||
| − | **<code>echo 'export HISTTIMEFORMAT="%d/%m/%y %T "' >> ~/.bash_profile</code><ref>https://www.cyberciti.biz/faq/unix-linux-bash-history-display-date-time/</ref> | + | ** <code>echo '[[export]] [[HISTTIMEFORMAT]]="%d/%m/%y %T "' >> ~/.[[bash_profile]]</code><ref>https://www.cyberciti.biz/faq/unix-linux-bash-history-display-date-time/</ref> |
| − | **<code>export PROMPT_COMMAND='if [ "$(id -u)" -ne 0 ]; then echo "$(date "+%Y-%m-%d.%H:%M:%S") $(pwd) $(history 1)" >> ~/.logs/bash-history-$(date "+%Y-%m-%d").log; fi'</code><ref>https://gist.github.com/NISH1001/bf2b713418b4e2ede8e6a7373b42c4c1</ref> | + | **<code>export [[PROMPT_COMMAND]]='if [ "$(id -u)" -ne 0 ]; then echo "$(date "+%Y-%m-%d.%H:%M:%S") $(pwd) $(history 1)" >> ~/.logs/bash-history-$(date "+%Y-%m-%d").log; fi'</code><ref>https://gist.github.com/NISH1001/bf2b713418b4e2ede8e6a7373b42c4c1</ref> |
**Sending history to syslog (needs recompiling source): Bash also support syslog capabilities at compiling time<ref>https://unix.stackexchange.com/questions/457107/sending-bash-history-to-syslog</ref> but it is not enabled by default in most distributions: https://github.com/bminor/bash/blob/d233b485e83c3a784b803fb894280773f16f2deb/config-top.h | **Sending history to syslog (needs recompiling source): Bash also support syslog capabilities at compiling time<ref>https://unix.stackexchange.com/questions/457107/sending-bash-history-to-syslog</ref> but it is not enabled by default in most distributions: https://github.com/bminor/bash/blob/d233b485e83c3a784b803fb894280773f16f2deb/config-top.h | ||
| − | |||
== Activities == | == Activities == | ||
# Install https://github.com/ohmybash bash customization | # Install https://github.com/ohmybash bash customization | ||
| + | # Review output from <code>history</code> command | ||
| + | |||
| + | == Other terms == | ||
| + | * <code>[[set -o history]]</code> | ||
| + | * <code>[[docker history]]</code> | ||
| + | * <code>[[history --help]]</code> | ||
| + | * <code>[[histappend]]</code> | ||
== See also == | == See also == | ||
| − | * | + | * {{acct}} |
| − | + | * {{history}} | |
| + | * {{Bash}} | ||
| Line 28: | Line 36: | ||
[[Category:Bash programming|*]] | [[Category:Bash programming|*]] | ||
| − | {{CC | + | {{CC license}} |
Source: https://en.wikiversity.org/wiki/Bash_programming/Bash_History | Source: https://en.wikiversity.org/wiki/Bash_programming/Bash_History | ||
Latest revision as of 14:33, 25 January 2024
Bash command history feature allows to recall, edit and rerun previous commands. Also allows commands to be saved using the history -a command[1][2].
Variables to control Bash History:
- HISTSIZE (
echo $HISTSIZE) - HISTFILE[3]: The default value is
~/.bash_history - HISTFILESIZE
- HISTTIMEFORMAT [4]
Contents
Usage[edit]
- Save every executed command to:
~/.bash_history
- Advanced examples:
echo 'export HISTTIMEFORMAT="%d/%m/%y %T "' >> ~/.bash_profile[5]export PROMPT_COMMAND='if [ "$(id -u)" -ne 0 ]; then echo "$(date "+%Y-%m-%d.%H:%M:%S") $(pwd) $(history 1)" >> ~/.logs/bash-history-$(date "+%Y-%m-%d").log; fi'[6]- Sending history to syslog (needs recompiling source): Bash also support syslog capabilities at compiling time[7] but it is not enabled by default in most distributions: https://github.com/bminor/bash/blob/d233b485e83c3a784b803fb894280773f16f2deb/config-top.h
Activities[edit]
- Install https://github.com/ohmybash bash customization
- Review output from
historycommand
Other terms[edit]
See also[edit]
acct- Bash history:
history[ -a | -c | -r ],history --help,~/.bash_history,HISTFILE, HISTSIZE, HISTTIMEFORMAT, HSTR Bash [ -c ],alias,&&, Bash history, Autocompletion,set,unset,export,.bash_aliases, .bashrc and .bash profile,PS1,echo,brace expansion, Function,shopt,trap,set -e,source,PATH,complete,disown,.hushlogin,.bashrc,builtin,eval,set,$PATH,$HOME,TZ,.profile,-e, -i,Builtin (Bash),mapfile,~, return (Bash), for, until,declare, dirname, basename, functions.sh, Bash arithmetic expansion,shift, bash --rcfile, readonly
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Source: https://en.wikiversity.org/wiki/Bash_programming/Bash_History
- ↑ https://unix.stackexchange.com/questions/145250/where-is-bashs-history-stored
- ↑ https://www.gnu.org/software/bash/manual/bash.html#Bash-History-Builtins
- ↑ <https://www.gnu.org/software/bash/manual/bash.html#index-HISTFILE
- ↑ https://www.gnu.org/software/bash/manual/bash.html#index-HISTTIMEFORMAT
- ↑ https://www.cyberciti.biz/faq/unix-linux-bash-history-display-date-time/
- ↑ https://gist.github.com/NISH1001/bf2b713418b4e2ede8e6a7373b42c4c1
- ↑ https://unix.stackexchange.com/questions/457107/sending-bash-history-to-syslog
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