When someone comes to me these days for knowledge about basic Unix/MacOS/Linux CLI tools, I direct them to the GNU core utilities documentation - it is very nic

When someone comes to me these days for knowledge about basic Unix/MacOS/Linux CLI tools, I direct them to the GNU core utilities documentation - it is very nicely organised according to task. I also demonstrate how CLI can do read-based operations as fast as SQL on medium size databases (just take an SQL dump and pipe) - https://www.gnu.org/software/coreutils/manual/html_node/index.html https://www.gnu.org/software/coreutils/manual/html_node/inde... For various sorting and filtering followed by report generation in latex etc., a knowledge of awk also helps. I use the mawk interpreter since I have found it to be slightly faster with ASCII format files.