"Although these may not be necessarily productivity-related, they will surely ease working in a Bash terminal and it may be worth knowing them. If you're not familiar with the terminal, command-line interface and Bash you can go ahead and read my introduction to Linux CLI.
"Using Ctrl+R (reversed search)
Ctrl+R performs a reversed search in the history. For example, typing the command df -h | grep /dev/sda1, then pressing Ctrl+R and typing only df, the most recent command will be auto-completed and performed upon pressing Enter. Ctrl+R searches for occurences of what you type and returns the last command in which it finds it:"
