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It is impossible to remember details of Linux utilities: there are too many of them and some are quite complex (find, xargs, grep, systemctl, etc). To compensate for the low quality on Linux man pages (which typically lack meaningful examples) you can use community database (for example tldr database available from GitHub; it can be viewed using Web browser from ostera.io) or to create a private database of examples, partially or fully extracted from .bash_history. The latter allows to adapt examples to your needs and as such is closer to the idea of a knowledgebase, although one does not exclude another.
I experimented with adaptation for this purpose of Python script eg, available from GitHub and got encouraging results. The idea is to supplement the default set of pages with examples provided with eg with pages from tldr and gradually enhance and edit them by incorporating own examples from .bash history.
The script eg uses two directories for storing the examples files (one for each utility; each written in the subset of Markdown)
If pages for the particular tool/utility are present in both, eg merges them creating composite page. So it is possible for example to store your own example in custom directory, and tldr in default directory but I prefer to edit tldr pages directly.
To create a private knowledgebase of examples that uses the suggested above format with set of tldr pages as the initial content of the knowledgebase, you need first to download two zip files from GitHub eg-master.zip and tldr-main.zip to your home directory. That allows to avoid pains with proxy.
After that run the following installation script. Alias eg needs to be added to your .bash_profile or to .bashrc, depending on how your dot files are organized. The script adds it .bash_profile which might be incorrect.The script was posted on on May 5, 2021 at GitHub at admutils/eg_install.sh
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Last modified: May 05, 2021