# Extended Globbing

Much like the order of operations in mathematics, Bash evaluates these shell expansions in a specific order.

1. Brace Expansion
   * `{1..8}`
2. Tilde Expansion
   * `~/`
3. Parameter Expansion
   * `$USER , $USERID`
4. Variable Expansion
   * `$(who | tail -n10 | awk '{print $2}')`
5. Arithmetic Expansion & Command Substitution (left to right)
   * `$(($USERID + 12 ))`
6. Word Splitting
7. Filename Expansion
   * `.*`
8. Quote Removal
   * `"$USER"`

ENABLING EXTENDED GLOBBING

`shopt -s extglob`

LEARNNN

```bash
cd PracticeFiles
touch Logfile_{0{0..9},1{1..2}}_{1..30}_202{0..2}.{txt,log}.{csv,xlsx,pdf}; touch Logfile_{0{0..9},1{1..2}}_{1..30}_202{0..2}.{txt,log}; touch Backup_{0{0..9},1{1..2}}_{1..30}_202{0..2}.{txt,log}.{csv,xlsx,pdf}; touch Backup_{0{0..9},1{1..2}}_{1..30}_202{0..2}.{txt,log}; touch corgi.{png,jpg,raw
mkdir {Logs,Backups}
#Be sure to enable extended globbing before continuing:
shopt -s extglob
#Use the ls command to list the files that match this pattern
ls @(Logfile)*@(@(.log|.txt)@(.csv|.xlsx|.pdf))
#Now that we’ve matched the proper files, we can move them to the Logs directory using them mv command.
mv @(Logfile)*@(@(.log|.txt)@(.csv|.xlsx|.pdf)) Logs
```