1.
[root@bogon ~]# cd /data/data1/zhangtao/
[root@bogon zhangtao]# ls
file1
[root@bogon zhangtao]# pwd
/data/data1/zhangtao
[root@bogon zhangtao]# mv file1 ../../
[root@bogon zhangtao]# cd /data/
[root@bogon data]# ls
data1 file1
2.
[root@bogon ~]# ln -s /lib64/libc.so /usr/lib64/libc.so
3.
[root@bogon ~]# cd /data/
[root@bogon data]# pwd
/data
[root@bogon data]# mkdir dic
[root@bogon data]# ls
data1 dic file1
4.
[root@bogon ~]# df –h
[root@bogon ~]# df –k
5.
[root@bogon ~]# ls /root | sed 's@^@root/@g' | paste -s -d ":"
root/anaconda-ks.cfg:root/cal100.sh:root/Desktop:root/Documents:root/Downloads:root/initia
l-setup-ks.cfg:root/Music:root/Pictures:root/Public:root/Templates:root/text:root/Videos
6.
[root@bogon ~]# vim cal100.sh
[root@bogon ~]# chmod a+x cal100.sh
[root@bogon ~]# ./cal100.sh
5050
[root@bogon ~]# cat cal100.sh
#!/bin/sh
sum=0
for ((i=0;i<=100;i++))
do
((sum=sum+i))
done
echo $sum
7.
[root@bogon ~]# cat text | tr 0-9 a-j > newtext
[root@bogon ~]# cat newtext
abcdefghij
8．
[root@bogon ~]# cat /etc/issue | tr a-z A-Z >/tmp/issue.out
[root@bogon ~]# cat /tmp/issue.out
S
KERNEL R ON AN M