| fc | |
| Developer: | Various open-source and commercial developers |
| Operating System: | Unix, Unix-like |
| Platform: | Cross-platform |
| Genre: | Command |
is a standard program on Unix and Unix-like operating systems that lists, edits and reexecutes commands previously entered to an interactive shell. fc is a builtin command in the Bash and Zsh shells and is an initialism for "fix command". It is particularly helpful for editing complex, multi-line commands. The editor can be specified by setting the EDITOR (changes the default editor) or the FCEDIT environment variable.
Flag -l used to list previous command history, with example showing command ls as item 1001 in the user's history.
Flag -s with this index would then recall the history command from 1001:
Though more powerfully, -s enables inline substitution.
$ fc -s ^floder^folder^ # Command revised and runs with correctionls folder
Most powerfully, executing fc on its own edits the last command executed. Editor can be specified on command line (-e) or via environment variable FCEDIT. User is thus able to fully modify the last command executed via the editor, upon exiting will execute the resultant command.[1]