学步园

程序12：类似java 里面的switch case
[root@localhost scripts]# cat sh12.sh<br /> read -p "input comand:" command<br /> case $command in<br /> "fix")<br /> echo "fix system"<br /> ;;<br /> "fuck")<br /> echo "fuck you"<br /> ;;<br /> *)<br /> echo "what a stupid man!ex>$0 some word"<br /> esac<br /> exit 0<br />

程序13：简单简单，超级简单的一个函数
[root@localhost scripts]# cat sh13.sh<br /> function printit()<br /> {<br /> echo -n "Your choice is $1"<br /> }<br /> #$1为控制台输入的第二个参数<br /> printit 1;echo $1 | tr 'a-z' 'A-Z'<br />

程序14:until do done
[root@localhost scripts]# cat sh14.sh<br /> until [ "$yn" = "yes" ] || [ "$yn" == "YES" ]<br /> do<br /> read -p "please input yes/to stop this program:" yn<br /> done<br />

程序15：while do done
[root@localhost scripts]# cat sh15.sh<br /> s=0<br /> i=0<br /> while [ "$i" != "100" ]<br /> do<br /> i=$(($i+1))<br /> s=$(($s+$i))<br /> done<br /> echo "number of 1+2+3+...+100=$s"

程序16：for do done

[root@localhost scripts]# cat sh16.sh<br /> s=0<br /> for((i=1;i<=100;i=i+1))<br /> do<br /> s=$(($s+$i))<br /> done<br /> echo $s<br /> exit 0<br />

程序17:for do done(2)

[root@localhost scripts]# cat sh17.sh<br /> for animal in dog cat elephant<br /> do<br /> echo "there are ""$animal"<br /> done<br /> exit 0<br />

程序18：利用 for do done查找某一个目录下面的文件权限信息
[root@localhost scripts]# cat sh18.sh<br /> read -p "input a directory:" dir<br /> if [ "$dir" == "" ] || [ ! -d "$dir" ]; then<br /> echo "The $dir is not exist in the system"<br /> exit 1<br /> fi<br /> echo `ls $dir`<br /> filelist=`ls $dir`<br /> for filename in $filelist<br /> do<br /> perm="";<br /> test -r "$dir/$filename" && perm="$perm readable"<br /> test -w "$dir/$filename" && perm="$perm writable"<br /> test -x "$dir/$filename" && perm="$perm execuatable"<br /> echo "The file $dir/$filename's permission is $perm"<br /> done<br />