Linux Shell脚本之自动修改IP

时间：2022-06-01 22:33:25

作为一名Linux
SA，日常运维中很多地方都会用到脚本，而服务器的ip一般采用静态ip或者MAC绑定，当然后者比较操作起来相对繁琐，而前者我们可以设置主机名、ip信息、网关等配置。修改成特定的主机名在维护和管理方面也比较方便。如下脚本用途为：修改ip和主机名等相关信息，可以根据实际需求修改，举一反三！

  1. #!/bin/sh
  2. #auto Change ip netmask gateway scripts
  3. #wugk 2012-12-17
  4. cat << EOF
  5. ++++++++自动修改ip和主机名等相关信息+++++++++
  6. ETHCONF=/etc/sysconfig/network-scripts/ifcfg-eth0
  7. HOSTS=/etc/hosts
  8. NETWORK=/etc/sysconfig/network
  9. DIR=/data/backup/`date +%Y%m%d`
  10. NETMASK=255.255.255.0
  11. +++++++++-------------------------+++++++++++
  12. EOF
  13. #Define Path  定义变量，可以根据实际情况修改
  14. ETHCONF=/etc/sysconfig/network-scripts/ifcfg-eth0
  15. HOSTS=/etc/hosts
  16. NETWORK=/etc/sysconfig/network
  17. DIR=/data/backup/`date +%Y%m%d`
  18. NETMASK=255.255.255.0
  19. echo "================================================"
  20. echo
  21. #定义change_ip函数
  22. function Change_ip ()
  23. {
  24. #判断备份目录是否存在，中括号前后都有空格，！叹号在shell表示相反的意思#
  25. if
  26. [ ! -d $DIR ];then
  27. mkdir -p $DIR
  28. fi
  29. echo "Now Change ip address ,Doing Backup Interface eth0"
  30. cp $ETHCONF $DIR
  31. grep "dhcp"  $ETHCONF
  32. #如下$?用来判断上一次操作的状态，为0，表示上一次操作状态正确或者成功#
  33. if
  34. [ $? -eq 0 ];then
  35. #read -p 交互输入变量IPADDR，注冒号后有空格，sed -i 修改配置文件#
  36. read -p "Please insert ip Address:" IPADDR
  37. sed -i 's/dhcp/static/g' $ETHCONF
  38. #awk -F. 意思是以.号为分隔域，打印前三列#
  39. echo -e "IPADDR=$IPADDR\nNETMASK=$NETMASK\nGATEWAY=`echo $IPADDR|awk -F. '{print $1"."$2"."$3}'`.254" >>$ETHCONF
  40. echo "This IP address Change success !"
  41. else
  42. echo -n  "This $ETHCONF is static exist ,please ensure Change Yes or NO":
  43. read i
  44. fi
  45. if
  46. [ "$i" == "y" -o "$i" == "yes" ];then
  47. read -p "Please insert ip Address:" IPADDR
  48. count=(`echo $IPADDR|awk -F. '{print $1,$2,$3,$4}'`)
  49. #定义数组， ${#count[@]}代表获取变量值总个数#
  50. A=${#count[@]}
  51. #while条件语句判断，个数是否正确，不正确循环提示输入，也可以用[0-9]来判断ip#
  52. while
  53. [ "$A" -ne "4" ]
  54. do
  55. read -p "Please re Inster ip Address,example 192.168.0.11 ip": IPADDR
  56. count=(`echo $IPADDR|awk -F. '{print $1,$2,$3,$4}'`)
  57. A=${#count[@]}
  58. done
  59. #sed -e 可以连续修改多个参数#
  60. sed -i -e 's/^IPADDR/#IPADDR/g' -e 's/^NETMASK/#NETMASK/g' -e 's/^GATEWAY/#GATEWAY/g' $ETHCONF
  61. #echo -e \n为连续追加内容，并自动换行#
  62. echo -e "IPADDR=$IPADDR\nNETMASK=$NETMASK\nGATEWAY=`echo $IPADDR|awk -F. '{print $1"."$2"."$3}'`.254" >>$ETHCONF
  63. echo "This IP address Change success !"
  64. else
  65. echo "This $ETHCONF static exist,please exit"
  66. exit $?
  67. fi
  68. }
  69. #定义hosts函数
  70. ############function hosts##############
  71. function Change_hosts ()
  72. {
  73. if
  74. [ ! -d $DIR ];then
  75. mkdir -p $DIR
  76. fi
  77. cp $HOSTS $DIR
  78. read -p "Please insert ip address": IPADDR
  79. host=`echo $IPADDR|sed 's/\./-/g'`
  80. cat $HOSTS |grep 127.0.0.1 |grep "$host"
  81. if
  82. [ $? -ne 0 ];then
  83. sed -i "s/127.0.0.1/127.0.0.1 $host/g" $HOSTS
  84. echo "This hosts change success "
  85. else
  86. echo "This $host IS Exist .........."
  87. fi
  88. }
  89. ###########fuction network###############
  90. #定义network函数
  91. function Change_network ()
  92. {
  93. if
  94. [ ! -d $DIR ];then
  95. mkdir -p $DIR
  96. fi
  97. cp $NETWORK $DIR
  98. read -p "Please insert ip address": IPADDR
  99. host=`echo $IPADDR|sed 's/\./-/g'`
  100. grep "$host" $NETWORK
  101. if
  102. [ $? -ne 0 ];then
  103. sed -i "s/^HOSTNAME/#HOSTNAME/g" $NETWORK
  104. echo "NETWORK=$host" >>$NETWORK
  105. else
  106. echo "This $host IS Exist .........."
  107. fi
  108. }
  109. #PS3一般为菜单提示信息#
  110. PS3="Please Select ip or hosts Menu":
  111. #select为菜单选择命令，格式为select $var in ..command.. do .... done
  112. select i in  "Change_ip" "Change_hosts" "Change_network"
  113. do
  114. #case 方式，一般用于多种条件下的判断
  115. case $i in
  116. Change_ip )
  117. Change_ip
  118. ;;
  119. Change_hosts )
  120. Change_hosts
  121. ;;
  122. Change_network )
  123. Change_network
  124. ;;
  125. *)
  126. echo
  127. echo "Please Insert $0: Change_ip(1)|Change_hosts(2)|Change_network(3)"
  128. echo
  129. ;;
  130. esac
  131. done

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