History and man-pages — Basics of Bash

Important notes

You can also press Ctrl+r and start typing a command you're looking for. You'll get an autocomplete of your past commands. Keep entering symbols and you'll get closer and closer to the thing you're looking for.

Press Ctrl+r to go to the previous occurence of the matching line

You can "tag" lines with # to find it easier later. E.g.:

ls -la  | grep doc | sort -r | wc #report

and then

Ctrl+r #report

You'll quickly come back to the original line. # creates a comment, and everything after # is ignored, but stays in history.

Lesson notes

• ↑ and ↓ to go to previous/next line in history
• history to view history
• !N to repeat a line from history, where N is a number (e.g. !32)
• !! to repeat the previous command
  • can also be used with other commands, e.g. !! | grep Doc will repeat the previous command and pipe it with grep Doc
• man to open man-page (help page) (e.g. man wc to open man-page for wc command)
  • opens inside a pager, so same navigation with j, k etc. works.

---

Are there any more questions? Ask them in the Discussion section.

The Hexlet support team or other students will answer you.

About Hexlet learning process

• Article “How to Learn and Cope with Negative Thoughts“
• Article “Learning Traps“
• Article “Complex and simple programming tasks“