Linux大小寫轉換方法
小寫轉大寫
(1)sed:cat file | sed 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'
(2)tr:cat file | tr a-z A-Z
cat file | tr "[:lower:]" "[:upper:]"
(3)perl:$string="abcdef";
$string =~ tr/[a-z]/[A-Z]/;
or
$string=uc($string);
uc是小寫轉大寫
小寫轉大寫
(1)sed:cat file | sed 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'
(2)tr:cat file | tr a-z A-Z
cat file | tr "[:lower:]" "[:upper:]"
(3)perl:$string="abcdef";
$string =~ tr/[a-z]/[A-Z]/;
or
$string=uc($string);
uc是小寫轉大寫
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