Coreutil on Raveen Kumar

fc fix command or fix previous command

Fri, 12 May 2023 00:00:00 +0000

In Bash, fc stands for “fix command” and it is a built-in command that allows you to work with the command history. The fc command provides a way to view, edit, and re-execute commands from your command history.

Here are some common uses of the fc command:

Viewing command history: You can use fc -l or simply fc to display the list of recently executed commands. By default, it shows the most recent commands with line numbers.

Grep for files that does not contain a specific string

Tue, 09 May 2023 00:00:00 +0000

Another useful way to use grep is for printing file names that do not contain a specific string, for example

grep -L "string" *

You can use the -L option of the grep command, which prints the names of all files that do not contain the specified search string.

The * at the end tells grep to search all files in the current directory. If you want to search only specific files or directories, you can replace the * with the filenames or directory names.

Periodically run a program and watch the output

Fri, 05 May 2023 00:00:00 +0000

watch

Execute a program periodically, showing output fullscreen

Example

watch ls

alternative - viddy