Bash Scripting
Reference
Variables
| Special Variable | Description |
|---|---|
| $0 | The name of the bash script. |
| $1, $2…$n | The bash script arguments. |
| $$ | The process id of the current shell. |
| $# | The total number of arguments passed to the script. |
| $@ | The value of all the arguments passed to the script. |
| $? | The exit status of the last executed command. |
| $! | The process id of the last executed command. |