Bash basic functions alias and shortcut keys

1、 Command alias

#alias Alias =‘ The original order ’ -------- Set command alias

#alias ------------ Query command alias

The order in which the command is executed

The first sequence executes a command executed with an absolute path or a relative path

Second order execution alias .

Third order execution Bash The internal order of

The fourth order is executed according to $PATH The first command found in the directory lookup order defined by the environment variable .

To delete an alias #unalias Alias

2、bash Common shortcut key

ctrl+A -- Move the cursor to the beginning of the command line , If the command we enter is too long , When you want to move the cursor to the beginning of the command line, use .

ctrl+E -- Move the cursor to the end of the command line

ctrl+C -- Forcibly terminate the current command

ctrl+L -- Clear the screen

ctrl+U -- Delete or cut the command before the cursor , If you enter a long command , You don't need to use the backspace key to delete characters one by one , It's more convenient to use this shortcut .

ctrl+K -- Delete or cut the content after the cursor

ctrl+Y -- Paste ctrl+U or ctrl+K Cut content

ctrl+R -- Search in historical orders , Press down ctrl+R after , The search interface will appear , Just enter the search content , It's going to search through history commands .

ctrl+D --- Exit the current terminal .

ctrl+Z --- Pause , And put it backstage .

ctrl+S ---- Pause screen output

ctrl+Q ---- Restore screen output