Scripting Basics Exercises

First, script 1, script/root/bin/systeminfo.sh, display the current host system information, including host name, IPV4 address, operating system version, kernel version, CPU model, memory size, hard disk size.    #!/bin/bash#echo  "hostname:       ' hostname '" echo  " ipv4address:    ' ifconfig |grep  ' inet\> '  |sed -nr  ' [email  PROTECTED]*ADDR: (. *) bca.*@\[email protected] "" echo  "system relases:   ' cat /etc/ Centos-release ' "echo " kernel release:   ' uname -r ' "echo " memory size:     ' cat meminfo|grep  ' memtotal "'" echo  "disk size:   ' fdisk -l  | grep  "^disk /dev/s[a-z]" ' "4, script/root/bin/links.sh, shows the IPV4 address and number of connections for each remote host connecting to the host, and sort by the number of connections from large to small    netstat -tn | awk  '/^tcp/{print $4,$1} '  | sort |uniq  -c| sort -n9, write a script/root/bin/hostping.sh, accept the IPV4 address of a host as parameters, test whether it can be connected. If Ping is available, the user is prompted to "This IP address is accessible" and if it is not ping, the user is prompted "The IP address is inaccessible"     #!/bin/bash    #    read -p  "please input a  ipv4 addr:  " addr    ping -W 2 -c 2  $addr   &>/dev/null && echo  "This ipv4addr can be access" | |  echo  "This ipv4addr can not be access" 10, determine whether each partition space of the hard disk and inode utilization is greater than 80, if yes, Email notification root Disk full      #!/bin/bash    #    for  I in  ' df |grep  ' ^/dev/sd " | cut -c 45-46 ';d o       echo  $I          if [  $I  -ge  80 ] ;then           cat /etc/ issue|mail -s  "Warning,please notice you sick"  test            echo  "Successful"          fi    done         for I in  ' df -i|grep  ' ^/dev/sd   | cut -c 41-42 ';d o      echo  $I           if [  $I  -ge 5 ];then            cat /etc/fstab|mail -s  "Warning,please notice you  sick " test           echo " Congratulation "&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;FI&NBSP;&NBSP;&NBSP;&NBSP;DONE11, specified file as parameter To determine if the file is a. sh suffix, and if so, add x permissions     #!/bin/bash    #     read -p  "please input a filename: "  filename    if  [[  $filename  =~ .*\.sh ]];then    chmod a+x  $filename     echo  " Funished "    else    exit     fi12, Determine if the IP entered is legal ip   #!/bin/bash    #    ipaddr= ' ^ (\< ([ 0-9]| [1-9] [0-9]|1[0-9]{2}|2 ([0-4][0-9]|5[0-5])) \>\.) {3}\< ([0-9]|[ 1-9][0-9]|1[0-5][1-9]|2 ([0-4][0-9]|25[0-5]) \>$ '     read -p  ' please  input a ipv4 addr:  " ipv4    if [[  $IPV 4 =~ $ ipaddr ]];then        echo  "A legal IP."     else        echo  "Unlegal ip"   &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;EXIT&NBSP;&NBSP;&NBSP;&NBSP;FI&NBSP;14, enter the starting value A and the last value B, calculate from A + (A+1) ... + ( B-1) The sum of the +b &NBSP;&NBSP;&NBSP;&NBSP;#!/BIN/BASH&NBSP;&NBSP;&NBSP;&NBSP;#&NBSP;&NBSP;&NBSp; sum=0        for i in seq $1 $2;do     let sum+= $I     done    echo  $sum

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Scripting Basics Exercises