2014-09-26shell脚本练习题

0

Budweiser小王子

铭哥，只要把平时工作中需要用的shell 脚本写出来就可以了！比较贴近实战嘛{:4_120:}

0

Louis

本帖最后由 Louis 于 2014-9-26 16:37 编辑

#!/bin/bash
## This script is for update bash the right release.
## Writed by Louis at 2014/09/25 20:30
os_release=`head -1 /etc/issue|awk -F. '{print $1}'|awk '{print $3}'`
bash_release=`rpm -q bash|sed 's/.x86_64//;s/.i686//'`
if [ $os_release -ge 6 ]; then
if [ "$bash_release" != "bash-4.1.2-15.el6_5.1" ]; then
yum update -y bash
if [ "$bash_release" == "bash-4.1.2-15.el6_5.1" ]; then
echo "Bash has been updated succeed!" > /tmp/update.log
else
echo "Update failed.please check it out." > /tmp/update.log
fi
else
echo "Bash release is the newest one. Do not need update." > /tmp/update.log
fi
elif [ $os_release -ge 5 ]; then
if [ "$bash_release" != "bash-3.2-33.el5.1" ]; then
yum update -y bash
if [ "$bash_release" == "bash-4.1.2-15.el6_5.1" ]; then
echo "Bash has been updated succeed!" > /tmp/update.log
else
echo "Update failed.please check it out." > /tmp/update.log
fi
else
echo "Bash release is the newest one. Do not need update." > /tmp/update.log
fi
else
echo "Your system is not release 5 or 6,please check it out."
fi

思路：
依据系统版本查看bash对应版本是否符合要求，如符合，记录版本已正确到日志；如不符合，更新。
更新后再次检验版本是否符合要求，如符合，记录更新成功到日志，如还不符合，记录更新失败信息到日志。

2014/09/26 16:35修改：
上面脚本判断系统版本的if条件错误，应该用-eq，错用成了-ge。
第8行，if [ $os_release -ge 6 ]; then，改为：if [ $os_release -eq 6 ]; then；
第19行，elif [ $os_release -ge 5 ]; then，改为elif [ $os_release -eq 5 ]; then。

0

游夜

本帖最后由游夜于 2014-9-25 23:01 编辑

#!/bin/bash
os_ver=cat /etc/redhat-release|awk -F "." '{print $1}'|awk '{print $3}' #获取linux版本号，并进行处理
bash_ver= rpm -qa bash|sed 's/.i686//g'|sed 's/.x86_64//g' #获取bash版本号，并进行处理
case $os_ver in #判断linux版本为5还是6，并跳转到相应的command进行bash版本的判断
6)
if [ "$bash_ver" != "bash-4.1.2-15.el6_5.1" ]#判断的bash的版本是否为bash-4.1.2-15.el6_5.1，是则升级，不是则提示不需要升级
then
yum update -y bash
else
echo "Bash not need to update!"
fi
;;
5)
if [ "$bash_ver" != "bash-3.2-33.el5.1" ]#判断的bash的版本是否为bash-3.2-33.el5.1，是则升级，不是则提示不需要升级
then
yum update -y bash
else
echo "Bash not need to update!"
fi
;;
esac

0

齐天大圣

本帖最后由齐天大圣于 2014-9-26 10:03 编辑

Louis 发表于 2014-9-25 20:45
思路：
依据系统版本查看bash对应版本是否符合要求，如符合，记录版本已正确到日志；如不符合，更新。
更 ...

-eq好于-ge，这样可以精确匹配。如我我版本是6,if符合条件，else还是符合条件

0

陈沛

本帖最后由陈沛于 2014-9-26 13:58 编辑

#/bin/bash
# 2014-09-26
# chenpei
# bash version update
# Linux bash update
bash_update() {
read -p "The input "Y OR N" : " Y_N
case $Y_N in
5)
echo "正在升级。"
yum update -y bash
;;
*)
echo "输入非Y选项，放弃升级。"
;;
esac
}
# Linux bash update to compare
bash_update_compare() {
tmp=`rpm -qf /bin/bash | awk -F'.' '{printf $NF}'`
#Linux bash version
bash_version=`rpm -qf /bin/bash | sed "s#\.${tmp}##g"`
#Whether to upgrade
#由于不能低于指定版本(进行简单的版本号比较)
#主版本号比较
up_bash=`echo $1 | awk -F'[-]' '{print $2}'`
old_bash=`echo $bash_version | awk -F'[-]' '{print $2}'`
if [ `echo $old_bash | awk -F'.' '{print $1}'` -gt `echo $up_bash | awk -F'.' '{print $1}'` ] ; then
bash_update
return 1;
elif [ `echo $old_bash | awk -F'.' '{print $2}'` -gt `echo $up_bash | awk -F'.' '{print $2}'` ] ; then
bash_update
return 1;
elif [ `echo $old_bash | awk -F'.' '{print $3}'` -gt `echo $up_bash | awk -F'.' '{print $3}'` ] ; then
bash_update
return 1;
fi
#次版本号比较
up_bash=`echo $1 | awk -F'[-]' '{print $3}'`
old_bash=`echo $bash_version | awk -F'[-]' '{print $3}'`
if [ `echo $old_bash | awk -F'.' '{print $1}'` -gt `echo $up_bash | awk -F'.' '{print $1}'` ] ; then
bash_update
return 1;
fi
echo "bash版本无需升级。"
}
# Linux vsersion
version=`cat /etc/issue | sed 's#[^0-9/.]##g' | awk -F'.' '{print $1}'`
# Linux system selection
case $version in
5) #Red Hat Enterprise Linux 5 - bash-3.2-33.el5.1
bash_update_compare bash-3.2-33.el5.1
;;
6) #Red Hat Enterprise Linux 6 - bash-4.1.2-15.el6_5.1
bash_update_compare bash-4.1.2-15.el6_5.1
;;
*)
echo "您使用的Linux系统版本过高或高低无法进行测试与升级。"
;;
esac

/*****************************************************************************/
本shell脚本只是实现思路，语法与简单实现，没有进行详细的测试，可能会有问题

0

Budweiser小王子

#bash update
os=`cat /etc/redhat-release |awk '{print $3}'|awk -F . '{print $1}'`
bash=`rpm -qa bash |sed 's/.x86_64//g' |sed 's/.i686//g'`

if [ $os -ge 5 -o $os -le 6 ];then
if [ '$bash' != 'bash-4.1.2-15.el6_5.1' -o '$bash' != 'bash-3.2-33.el5.1' ];then
   yum update -y bash
   else
      echo "you bash not update"
   fi
fi
~

0

Louis

齐天大圣发表于 2014-9-26 09:59
-eq好于-ge，这样可以精确匹配。如我我版本是6,if符合条件，else还是符合条件

写错了，我想写的本来就是-eq

0

齐天大圣

Louis 发表于 2014-9-26 16:33
写错了，我想写的本来就是-eq

{:4_117:}{:4_117:}

0

soar

本帖最后由 soar 于 2014-9-26 22:41 编辑

#!/bin/bash
os=`head -1 /etc/issue | awk '{print $3}'| awk -F "." '{print $1}'`
bash_version=`rpm -q bash | sed 's/.i686//'`
if [ $os -eq 6 ]
then
      if [ $base_version = bash-4.1.2-15.el6_5.1 ]
      then
            echo "your bash needn't to update">./tmp/bashupdate.log
      else
            /usr/bin/yum update -y bash
      fi
elif [ $os -eq 5 ]
then
      if [ $bash_version = bash-3.2-33.el5.1 ]
      then
               echo "your bash needn't to update">./tmp/bashupdate.log
      else
            /usr/bin/yum update -y bash
      fi
else
      echo "your os version is not 5 or 6,do nothing!!"
fi

0

泡沫。

留名再看。。。

0

So Long

本帖最后由程城于 2014-9-28 22:56 编辑

#!/bin/bash
#•Red Hat Enterprise Linux 7 - bash-4.2.45-5.el7_0.2
#•Red Hat Enterprise Linux 6 - bash-4.1.2-15.el6_5.1
#•Red Hat Enterprise Linux 5 - bash-3.2-33.el5.1
system_release=`head -n 1  /etc/issue |awk '{print $3}'|awk -F '.' '{print $1}'`
bash_release=`bash -version | head -n 1 |awk '{print $4}'|sed 's/(.*//g'`
case $system_release in
5)
      a=`echo $bash_release |awk -F '.' '{print $1}'`
      b=`echo $bash_release |awk -F '.' '{print $2}'`
      c=`echo $bash_release |awk -F '.' '{print $3}'`
      if [ $a lt 3 ];then
            echo "warning ! you should update your  bash up to bash-3.3-33"
      elif [ $a gt 3 ];then
            echo "your bash_release is big then bash-3.2-33,you should not update"
      else
            if [ $b lt 2 ];then
                     echo "warning ! you should update your bash up to bash-3.2-33"
            elif [ $b gt 2 ];then
                     echo "your bash_release is big then bash-3.2-33,you should not update"
            else
                     if [ $c le 0 ] ;then
                              echo "warning ! you should update your bash up to bash-3.2-33"
                     else
                              echo "your bash_release is big then bash-3.2-33,you should not update"
                     fi
            fi
      fi
      ;;
6)
      a=`echo $bash_release |awk -F '.' '{print $1}'`
      b=`echo $bash_release |awk -F '.' '{print $2}'`
      c=`echo $bash_release |awk -F '.' '{print $3}'`
      if [ $a lt 4 ];then
            echo "warning ! you should update your  bash up to bash-3.3-33"
      elif [ $a gt 4 ];then
            echo "your bash_release is big then bash-3.2-33,you should not update"
      else
            if [ $b lt 1 ];then
                     echo "warning ! you should update your bash up to bash-3.2-33"
            elif [ $b gt 1 ];then
                     echo "your bash_release is big then bash-3.2-33,you should not update"
            else
                     if [ $c le 2 ] ;then
                              echo "warning ! you should update your bash up to bash-3.2-33"
                     else
                              echo "your bash_release is big then bash-3.2-33,you should not update"
                     fi
            fi
      fi
      ;;
*)
      echo "you system errors!"
      ;;
esac

0

wyatt88

#!/bin/bash
#name:check_bash.sh
#author:ww
#check bash version
os_version=`cat /etc/issue | grep release | awk '{print $3}' | awk -F '.' '{print $1}'`
bash_version=`rpm -qa bash | awk -F '-' '{print $2"-"$3}'|cut -d '.' -f 1,2,3,4,5`
echo $os_version $bash_version
case $os_version in
5)
if [ "$bash_version" == "3.2-33.el5.1" ]
then
echo "the bash version is lastest"
else
yum update -y bash
fi
;;
6)
if [ "$bash_version" == "4.1.2-15.el6_5.1" ]
then
echo "the bash version is lastest"
else
yum update -y bash
fi
;;
7)
if [ "$bash_version" == "4.2.45-5.el7_0.2" ]
then
echo "the bash version is lastest"
else
yum update -y bash
fi
;;
*)
echo "i cant get the os version"
;;
esac

0

wyatt88

wyatt88 发表于 2014-9-28 10:22

就差bash小版本的比较了要不如果小版本已经升级到最新了还是会update 只不过update什么都不做

0

齐天大圣

wyatt88 发表于 2014-9-28 10:22

写的太好了！{:4_96:}

0

wyatt88

齐天大圣发表于 2014-9-28 12:03
写的太好了！

大圣。。。{:4_113:}

0

楓瀛夢鞢

#! /bin/bash

os=`head -1 /etc/issue |awk '{print $3}'|awk -F'.' '{print $1}'`
bash_ver=`rpm -q  bash|sed 's/.x86_64//g'||'s/.i686//g'`

if [ $os -lt 6 ] ;then
      if [ $bash_ver != "bash-3.2-33.el5.1" ]
      then
      echo "bash update now!"
      yum update bash -y
      else
      echo "bash don't need to update!" > /tmp/update.log
      fi
elif [ $os -ge 6 ] && [$os -lt 7 ];then
      if [ $bash_ver != "bash-4.1.2-15.el6_5.1" ]
      then
      echo "bash update now!"
      yum update bash -y
      else
      echo "bash don't need to update!" > /tmp/update.log
      fi
else
      if [ $bash_ver != "bash-4.2.45-5.el7_0.2" ]
      then
      echo "bash update now!"
      yum update bash -y
      else
      echo "bash don't need to update!" > /tmp/update.log
      fi
fi

0

陌懒

本帖最后由陌懒于 2014-9-28 17:31 编辑

#!/bin/bash
#升级BASH版本
os=`cat /etc/issue|awk '{print $3}'|head -n 1|cut -d '.' -f 1`
bash=`rpm -q bash|cut -d '-' -f 2,3`

#Centos5的bash版本判断

if [ $os == 5 ] ;then
      echo "The system is Red Hat Enterprise Linux 5" >/tmp/update5.log
      if [ $bash == 3.2-33.el5.1 ] ;then
            echo "The Red Hat Enterprise Linux 5 system has been updated." >>/tmp/update5.log
                     else yum update -y bash
                           echo "The Red Hat Enterprise Linux 5 system update succeed!" >>/tmp/update5.log
      fi
fi

#Centos6的版本判断
if [ $os == 6 ] ;then
      echo "The system is Red Hat Enterprise Linux 6" >/tmp/update6.log
      if [ $bash == 4.1.2-15.el6_5.1 ] ;then
            echo "The Red Hat Enterprise Linux 6 system can't update." >>/tmp/update6.log
                     else yum update -y bash
                           echo "The Red Hat Enterprise Linux 6 system update succeed!" >>/tmp/update6.log
      fi
fi

0

So Long

#!/bin/bash
#•Red Hat Enterprise Linux 7 - bash-4.2.45-5.el7_0.2
#•Red Hat Enterprise Linux 6 - bash-4.1.2-15.el6_5.1
#•Red Hat Enterprise Linux 5 - bash-3.2-33.el5.1
system_release=`head -n 1  /etc/issue |awk '{print $3}'|awk -F '.' '{print $1}'`
bash_release=`bash -version | head -n 1 |awk '{print $4}'|sed 's/(.*//g'`
case $system_release in
5)
      a=`echo $bash_release |awk -F '.' '{print $1}'`
      b=`echo $bash_release |awk -F '.' '{print $2}'`
      c=`echo $bash_release |awk -F '.' '{print $3}'`
      if [ $a lt 3 ];then
            echo "warning ! you should update your  bash up to bash-3.3-33"
      elif [ $a gt 3 ];then
            echo "your bash_release is big then bash-3.2-33,you should not update"
      else
            if [ $b lt 2 ];then
                     echo "warning ! you should update your bash up to bash-3.2-33"
            elif [ $b gt 2 ];then
                     echo "your bash_release is big then bash-3.2-33,you should not update"
            else
                     if [ $c le 0 ] ;then
                              echo "warning ! you should update your bash up to bash-3.2-33"
                     else
                              echo "your bash_release is big then bash-3.2-33,you should not update"
                     fi
            fi
      fi
      ;;
6)
      a=`echo $bash_release |awk -F '.' '{print $1}'`
      b=`echo $bash_release |awk -F '.' '{print $2}'`
      c=`echo $bash_release |awk -F '.' '{print $3}'`
      if [ $a lt 4 ];then
            echo "warning ! you should update your  bash up to bash-3.3-33"
      elif [ $a gt 4 ];then
            echo "your bash_release is big then bash-3.2-33,you should not update"
      else
            if [ $b lt 1 ];then
                     echo "warning ! you should update your bash up to bash-3.2-33"
            elif [ $b gt 1 ];then
                     echo "your bash_release is big then bash-3.2-33,you should not update"
            else
                     if [ $c le 2 ] ;then
                              echo "warning ! you should update your bash up to bash-3.2-33"
                     else
                              echo "your bash_release is big then bash-3.2-33,you should not update"
                     fi
            fi
      fi
      ;;
*)
      echo "you system errors!"
      ;;
esac

0

cmzsteven

本帖最后由 cmzsteven 于 2015-2-10 16:37 编辑

#!/bin/bash
sys_ver=`cat /etc/centos-release|awk '{print $3}'|awk -F '.' '{print $1}'`
bash_path=`which bash`
bash_ver=`rpm -qf $bash_path`
bash_ver=`echo $bash_ver|sed 's/-/./g'`
bv1=`echo $bash_ver|awk -F '.' '{print $2}'`
bv2=`echo $bash_ver|awk -F '.' '{print $3}'`
bv3=`echo $bash_ver|awk -F '.' '{print $4}'`
bv4=`echo $bash_ver|awk -F '.' '{print $5}'`
function update_bash()
{
if [ $1 -eq 1 ];then
yum clean all
yum makecache
yum -y update bash
else
echo "The bash on your system is not need to update!"
fi
}
function test_verion_5()
{
test_result=0
if [ $1 -lt 3 ]; then
test_rerult=1
else
if [ $2 -lt 2 ]; then
test_result=1
else
if [ $3 -lt 33 ]; then
test_result=1
fi
fi
fi
update_bash $test_result
}
function test_version_6()
{
test_result=0
if [ $1 -lt 4 ]; then
test_rerult=1
else
if [ $2 -lt 1 ]; then
test_result=1
else
if [ $3 -lt 2 ]; then
test_result=1
else
if [ $4 -lt 15 ]; then
test_result=1
fi
fi
fi
fi
update_bash $test_result
}
function test_version_7()
{
test_result=0
if [ $1 -lt 4 ]; then
test_rerult=1
else
if [ $2 -lt 2 ]; then
test_result=1
else
if [ $3 -lt 45 ]; then
test_result=1
else
if [ $4 -lt 5 ]; then
test_result=1
fi
fi
fi
fi
update_bash $test_result
}
case $sys_ver in
5)
test_version_5 $bv1 $bv2 $bv3
;;
6)
test_version_6 $bv1 $bv2 $bv3 $bv4
;;
7)
test_version_7 $bv1 $bv2 $bv3 $bv4
;;
esac

0

翟厚翔

#!/bin/bash LINVERC=`lsb_release -a` BACVERC=`/bin/bash -version` let LINVER=`echo "$LINVERC"|grep 'Release' |awk -F' ' '{print $2}'|awk -F'.' '{print $1}'` BACVER=`echo "$BACVERC"|head -1|awk -F' ' '{print $4}'` echo "$BACVER" > BACVER.log echo "4.1.2(1)-release" > BACVER6.log b6=`md5sum BACVER6.log > BACVER6.md5` echo "3.2.33(1)-release" > BACVER5.log b5=`md5sum BACVER5.log> BACVER5.md5` if [ $LINVER -eq 5 ];then LINST=`echo "$BACVER" > BACVER5.log` LINST5=` md5sum BACVER5.log >BACVER5.md5` b5=`md5sum -c --status BACVER5.md5` st=`echo $?` if [ $st -eq 0 ];then echo " linux version is 5 , it is not need update" else echo "yum intall 5" fi fi if [ $LINVER -eq 6 ];then LINST=`echo "$BACVER" > BACVER6.log` LINST6=`md5sum BACVER6.log >BACVER6.md5` bc=`md5sum -c --status BACVER6.md5` st=`echo $?` if [ $st -eq 0 ];then echo " linux version is 6 , it is not need update" else echo "yum intall 6" fi fi

0

翟厚翔

#!/bin/bash
LINVERC=`lsb_release -a`
BACVERC=`/bin/bash -version`
let LINVER=`echo "$LINVERC"|grep 'Release' |awk -F' ' '{print $2}'|awk -F'.' '{print $1}'`
BACVER=`echo "$BACVERC"|head -1|awk -F' ' '{print $4}'`

  echo  "$BACVER" > BACVER.log
  echo  "4.1.2(1)-release" > BACVER6.log
  b6=`md5sum BACVER6.log > BACVER6.md5`

  echo  "3.2.33(1)-release" > BACVER5.log
   b5=`md5sum BACVER5.log> BACVER5.md5`
if [ $LINVER -eq 5 ];then
   LINST=`echo  "$BACVER" > BACVER5.log`
   LINST5=` md5sum BACVER5.log >BACVER5.md5`
   b5=`md5sum -c --status BACVER5.md5`
   st=`echo $?`
   if [ $st -eq 0 ];then
      echo " linux  version is 5 , it is not need update"
   else
         echo "yum intall 5"
   fi
fi

if [ $LINVER -eq 6 ];then
   LINST=`echo  "$BACVER" > BACVER6.log`
   LINST6=`md5sum BACVER6.log >BACVER6.md5`
   bc=`md5sum -c --status BACVER6.md5`
   st=`echo $?`
   if [ $st -eq 0 ];then
      echo " linux  version is 6 , it is not need update"
   else
         echo "yum intall 6"
   fi
fi

0

hlymlv

跑题了，觉得这样交互不错又简单
#!/bin/bash
linux=`cat /etc/issue`
bash=`rpm -q bash`
echo $linux
echo $bash
read -p "please choose to update or not:" i
case $i in
[qQ]|[Qq][Uu][Ii][Tt])
echo "Bye."
exit
;;
[Nn]|[Nn][Oo])
echo "bash don't need update."
exit
;;
[Yy]|[Yy][Ee][Ss])
/usr/bin/yum update -y bash
;;
esac
exit 0

0

lyhabc

#!/bin/bash
#write by 2016-2-1
vv=$(cat /etc/redhat-release|awk '{print $3}'|awk -F "." '{print $1}')
ve=$(rpm -qa|grep bash)
nver=$(echo $ve|awk -F "" '{print $2}'|awk -F ".el" '{print $1}'|sed  "s/\.//g" | sed  "s/\-//g")

if [ $vv -ge 5 ] && [ $vv -lt  6 ]
then
if [ $nver -gt 3233 ]
then
echo "dont need to update"
else
echo " need to update"
yum update bash
fi

elif [ $vv -ge 6 ] && [ $vv -lt  7 ]
then
if [ $nver -gt 41215 ]
then
echo "dont need to update"
else
echo " need to update"
yum update bash
fi
elif [ $vv -ge  ]
then
if [ $nver -gt 42455 ]
then
echo "dont need to update"
else
echo " need to update"
yum update bash
fi
fi

0

lyhabc

Updating:
bash                x86_64                4.1.2-33.el6_7.1                   updates                908 k

Transaction Summary
=======================================================================================================================
Upgrade    1 Package(s)

Total download size: 908 k
Is this ok [y/N]: y
Downloading Packages:
bash-4.1.2-33.el6_7.1.x86_64.rpm                                                                                                                                                                                  | 908 kB    00:02
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Updating : bash-4.1.2-33.el6_7.1.x86_64                                                                                                                                                                                           1/2
  Cleanup : bash-4.1.2-29.el6.x86_64                                                                                                                                                                                              2/2
  Verifying  : bash-4.1.2-33.el6_7.1.x86_64                                                                                                                                                                                           1/2
  Verifying  : bash-4.1.2-29.el6.x86_64                                                                                                                                                                                              2/2

Updated:
  bash.x86_64 0:4.1.2-33.el6_7.1

Complete!
[root@steven ~]# yum update -y bash

0

bbcw

#!/bin/bash
n=`bash -version|head -1|cut -d' ' -f4`
VERSION=`echo ${n:0:5}`
if [ $VERSION -lt 4.1.2 ];then
yum clean all
yum makecache
yum -y update bash
fi

0

大仔黑黑

#!/bin/bash
##written by wangyl
##2016=03-18

os_release=`head -1 /etc/issue/ | awk -F'.' '{print $1} | awk -F' ' '{print $3}''`
bash_release=`rpm -q bash|sed 's/.x86_64//;s/.i686//'`

if [ $os_release -eq 5 ] ;then
      if [ "$bash_release" != "bash-3.2-33.el5.1" ];then
            yum update -y bash
            if [ "$bash_release" == "bash-3.2-33.el5.1" ];then
                     echo "Congratulations to you,the update was successful!" > /tmp/update.log
            else
                     echo "Sorry,the update was failed,please check it out!" > /tmp/update.log
            fi
      fi
elif [ $os_relsase -eq 6 ];then
      if [ "$bash_release" != "bash-4.1.2-15.el6_5.1" ];then
            yum update -y bash
            if [ "$bash_release" == "bash-4.1.2-15.el6_5.1" ];then
                     echo "Congratulations to you,the update was successful!" > /tmp/update.log
            else
                     echo "Sorry,the update was failed,please check it out!" > /tmp/update.log
            fi
      fi
fi

0

kevinjin

#! /bin/bash

linux_version=`cat /etc/centos-release |awk '{print $3}'`
bash_version=`bash --version |head -1 |awk '{print $4}' |awk -F'.' '{print $1$2$3}' |sed 's#(1)-release##g'`

if [ linux_version -lt 6 || bash_version -lt 412]
then
yum update
else
echo "no need to update."
fi

0

liupeng

参考参考

0

liupeng

学习学习

0

kw是id

#!/bin/bash
os=`cat /etc/issue|sed -n '1'p|awk '{print $3}'|awk -F '.' '{print $1}'`
ver=`cat /etc/issue|sed -n '1'p|awk '{print $3}'|awk -F '.' '{print $2}'`
bash_v=`rpm -qa bash|awk -F '.' '{OFS="."} {print $1,$2,$3}'`
case $os in
       5)
           if [ $ver -lt 9 ]
           then
               /usr/bin/yum -y update >/dev/null 2>&1
           else
               echo "your linux version $os$ver is the latest one, no need to update"
           fi
           if [ $bash_v != "bash-3.2-33" ]
           then
               /usr/bin/yum update -y bash /dev/null 2>&1
           else
              echo "the bash you installed is latest version $bash_v"
           fi
           ;;
       6)
           if [ $ver -lt 8 ]
           then
               /usr/bin/yum -y update /dev/null 2>&1
           else
               echo "your linux version $os$ver is the latest one, no need to update"
           fi
           if [ $bash_v != "bash-4.1.2-15" ]
           then
               /usr/bin/yum update -y bash /dev/null 2>&1
           else
              echo "the bash you installed is latest version $bash_v"
           fi
           ;;
esac

0

kw是id

#!/bin/bash
os=`cat /etc/issue|sed -n '1'p|awk '{print $3}'|awk -F '.' '{print $1}'`
ver=`cat /etc/issue|sed -n '1'p|awk '{print $3}'|awk -F '.' '{print $2}'`
bash_v=`rpm -qa bash|awk -F '.' '{OFS="."} {print $1,$2,$3}'`
case $os in
       5)
           if [ $ver -lt 9 ]
           then
               /usr/bin/yum -y update >/dev/null 2>&1
           else
               echo "your linux version $os$ver is the latest one, no need to update"
           fi
           if [ $bash_v != "bash-3.2-33" ]
           then
               /usr/bin/yum update -y bash /dev/null 2>&1
           else
              echo "the bash you installed is latest version $bash_v"
           fi
           ;;
       6)
           if [ $ver -lt 8 ]
           then
               /usr/bin/yum -y update /dev/null 2>&1
           else
               echo "your linux version $os$ver is the latest one, no need to update"
           fi
           if [ $bash_v != "bash-4.1.2-15" ]
           then
               /usr/bin/yum update -y bash /dev/null 2>&1
           else
              echo "the bash you installed is latest version $bash_v"
           fi
           ;;
esac

0

王斌

是不是学了 python 再写这些脚本就会简单点。

0

杨银根

#!/bin/bash

a1=`rpm -qa bash|awk -F. '{print $3}'|awk -F- '{print $1}'`

a2=`rpm -qa bash|awk -F. '{print $3}'|awk -F- '{print $2}'`

centos_6 () {

if [ $a1 -lt 2 -o $a2 -lt 15 ]

then

yum update bash

fi

echo "update no " >> /home/shell-10/t.log

}

centos_5 () {

if [ $a1 -lt 2 -o $a2 -lt 33 ]

then

yum update bash

fi

echo "update no " >> /home/shell-10/t.log

}

main () {

v=`uname -r|awk -F. '{print $3}'|awk -F- '{print $1}'`

case $v in

18)

centos_5

;;

32)

centos_6

;;

*)

echo "Centos version is not correct."

esac

}

main

2014-09-26shell脚本练习题

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2014-09-26shell脚本练习题

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