1 、 mv file1 ../../dic
2 、 ln -s /lib64/libc.so /usr/lib64/lib.so
3、mkdir dic
4、df -h df -k
5、ls -a /root |tr "\n" " "
6、echo {1..100}|tr " " +|bc 或seq -s + 1 100|bc
7, tr 0-9 aj file
8、tr a-z A-Z </etc/issue >/tmp/issue.out 或cat /etc/issue |tr a-z A-Z | >tmp/issue.out