Difference between revisions of "Bash history"
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:<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 | ||
Revision as of 05:22, 22 May 2020
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
- HISTFILE[3]: The default value is
~/.bash_history - HISTFILESIZE
- HISTTIMEFORMAT[4]
Contents
Usage
- Basic example:
export PROMPT_COMMAND='history -a'
- 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
- Install https://github.com/ohmybash bash customization
- Review output from
historycommand
Other terms
set -o historydocker history
See also
acct- fc
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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