马哥博客作业第一周

1.mv file1 ../../dic

2.ln -s /lib64/libc.so /usr/lib64/libc.so

 

3.mkdir dic

4.df -m | df -k

5.ls /root/

6.seq -s+ 1 100 | bc

7.cat test | tr '0-9' 'a-j'

8.cat /etc/issue | tr 'a-z' 'A-Z' >> /tmp/issue.out