Weekly tip: how to get the best out of the history command in GNU/Linux
Anybody who has used the command line extensively to navigate, understand and configure GNU/Linux will know that in the course of a few months’ work it is possible to build up an extensive history of used commands. This necessitates some pro-active management to get the best out of it. Here are some tips to make the most of the history command.
Please note, from the outset, that command history is only saved in interactive shells and does not, therefore, work with shell scripts.
By default, the shell Bash is designed to retain the last five hundred commands you entered. If you want to see them, just open ~/.bash_history and scroll through it. Or, by simply typing history on a command line the terminal will list them.
If you know there will be a lot of output, then it makes sense to pipe it to less: history | less; with less, you can see the command history one screen at a time (by pressing the spacebar) or one line at a time (by pressing the down arrow).
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