[root@master1-192-168-117-18 ~]# vim mkcdrom.sh
#!/bin/bash DIR="/media/cdrom" if [ ! -e $DIR ] then mkdir -p $DIR fi
[root@master1-192-168-117-18 ~]# vim chkhost.sh #!/bin/bash
ping -c 3 -i 0.2 -W 3 $1 &> /dev/null if [ $? -eq 0 ] then echo "Host $1 is on-line" else echo "Host $1 is off-line" fi
[root@master1-192-168-117-18 ~]# bash chkhost.sh 192.168.1.11 Host 192.168.1.11 is on-line
注释：-c参数来规定尝试的次数，并使用-i参数定义每个数据包的发送间隔，以及使用-W参数定义等待超时时间
[root@master1-192-168-117-18 ~]# vim chkscore.sh #!/bin/bash read -p "Enter your score (0-100) :" GRADE if [ $GRADE -gt 100 ]; then echo "$GRADE is Error" elif [ $GRADE -ge 85 ] && [ $GRADE -le 100 ]; then echo "$GRADE is Excellent" elif [ $GRADE -ge 70 ] && [ $GRADE -le 84 ]; then echo "$GRADE is Pass" else echo "$GRADE is Fail" fi [root@master1-192-168-117-18 ~]# bash chkscore.sh Enter your score (0-100) :200 200 is Error [root@master1-192-168-117-18 ~]# bash chkscore.sh Enter your score (0-100) :93 93 is Excellent [root@master1-192-168-117-18 ~]# bash chkscore.sh Enter your score (0-100) :80 80 is Pass [root@master1-192-168-117-18 ~]# bash chkscore.sh Enter your score (0-100) :23 23 is Fail
