Linux Shell 更改大小写
1 转换成大写
UPCASEVAR=$(echo $VARIABLE | tr '[a-z]' '[A-Z]')
2 转换成小写
UPCASEVAR=$(echo $VARIABLE | tr '[A-Z]' '[a-z]')
3 变量设置成永是大写 (或小写)
typeset -u VARIABLE
typeset -l VARIABLE
UPCASEVAR=$(echo $VARIABLE | tr '[a-z]' '[A-Z]')
UPCASEVAR=$(echo $VARIABLE | tr '[A-Z]' '[a-z]')
typeset -u VARIABLE
typeset -l VARIABLE