test.sh
#!/bin/bash while read line do echo $line | tr ‘[a-z]‘ ‘[A-Z]‘ done
输出
dddddd DDDDDD sssss SSSSS cdcdcdc CDCDCDC ssssssssssss SSSSSSSSSSSS
shell 将输入的字符转换成大写
原文：https://www.cnblogs.com/sea-stream/p/10086067.html
