linux大小写转换

[root@ob2 mytmp]# cat aa2.txt|sed 's#[a-z]#u&#g'
ETH0      LINK ENCAP:ETHERNET  HWADDR 00:0C:29:2B:B9:55 
          INET ADDR:192.168.79.130  BCAST:192.168.79.255  MASK:255.255.255.0
          INET6 ADDR: FE80::20C:29FF:FE2B:B955/64 SCOPE:LINK

[root@ob2 mytmp]# cat aa2.txt|sed 's#.#u&#g'
ETH0      LINK ENCAP:ETHERNET  HWADDR 00:0C:29:2B:B9:55 
          INET ADDR:192.168.79.130  BCAST:192.168.79.255  MASK:255.255.255.0

[root@ob2 mytmp]# cat aa2.txt|sed 's#.#l&#g'
eth0      link encap:ethernet  hwaddr 00:0c:29:2b:b9:55 
          inet addr:192.168.79.130  bcast:192.168.79.255  mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe2b:b955/64 scope:link