alias
make alias for commands.
alias display all alias
alias lb='ll -h'
make the change permanent:
- append alias to ~/.bashrc
-
. ~/.bashrcorsource ~/.bashrc
source
source is a bash builtin command, which executes commands in the file.
file1:
echo hello
source file1
display:
hello
. is a shortcut for source, which means . file1 is same as source file1.
Note that ./file1 will be executed in a new shell, while . file1 in the current shell.
