Shell 通配符、元字符、轉義符

shell首先處理，之後交給命令處理 g[email protected]:~$ cat file l{2} world hello linux [email protected]:~$ echo l{2} l{2} [email protected]:~$ echo 'l{2}' l{2} [email protected]:~$ echo "l{2}" l{2} [email protecte

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