Shell 编程基础知识食用（二）.pdf
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[root@Salvatore-zz ~]# echo "The cost of the item is $15"
The cost of the item is 5
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[root@Salvatore-zz ~]# echo ' The cost of the item is $15'
The cost of the item is $15
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[root@Salvatore-zz ~]# echo "The cost of the item is \$15"
The cost of the item is $15
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[root@Salvatore-zz script]# cat test3.sh
#!/bin/bash
#test variables
days=10
guest="zz"
echo "$guest checked in $days days ago"
[root@Salvatore-zz script]# chmod +x test3.sh
[root@Salvatore-zz script]# ll
total 4
-rwxr-xr-x. 1 root root 88 Feb 21 01:49 test3.sh
[root@Salvatore-zz script]# ./test3.sh
zz checked in 10 days ago
[root@Salvatore-zz script]#
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[root@Salvatore-zz script]# cat test4.sh
#!/bin/bash
#assigning a varable value to another varable
value1=10
value2=$value1
echo "The resulting value is $value2"
[root@Salvatore-zz script]# ./test4.sh
The resulting value is 10
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[root@Salvatore-zz script]# cat test4.sh
1
of 5
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