lowercase_uppercase.sh
#!/bin/bash
tr "[a-z]" "[A-Z]" < $1
验证:
[root@logstash ~]# cat 2.txt
02 06 11 12 19 29 06
afa dafda afafafa
adafdcfkfjkljljgojdojfdgjbnvn
[root@logstash ~]#
[root@logstash ~]# sh lowercase_uppercase.sh 2.txt
02 06 11 12 19 29 06
AFA DAFDA AFAFAFA
ADAFDCFKFJKLJLJGOJDOJFDGJBNVN
[root@logstash ~]#