shell基础巩固第四天

3年前 (2017-07-04) gtj linux, shell 0评论 已收录 204℃

for循环语句

for 变量 in 变量列表
do
指令
done

or
for ((exp1;exp2;exp3))
do
指令
done

rename改名软件

[root@sf106232 test]# ll
total 4
-rw-r--r-- 1 root root 68 Jun 20 17:41 del.sh
-rw-r--r-- 1 root root  0 Jun 20 15:49 test_201706201_1.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 test_201706201_2.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 test_201706201_3.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 test_201706201_4.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 test_201706201_5.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 test_201706201_6.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 test_201706201_7.txt
[root@sf106232 test]# rename "test"  "suixiaofeng"  *.txt
[root@sf106232 test]# ll
total 4
-rw-r--r-- 1 root root 68 Jun 20 17:41 del.sh
-rw-r--r-- 1 root root  0 Jun 20 15:49 suixiaofeng_201706201_1.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 suixiaofeng_201706201_2.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 suixiaofeng_201706201_3.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 suixiaofeng_201706201_4.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 suixiaofeng_201706201_5.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 suixiaofeng_201706201_6.txt
-rw-r--r-- 1 root root  0 Jun 20 15:49 suixiaofeng_201706201_7.txt
[root@sf106232 test]# 

先关闭3级别的开启的任务,然后开启需要开启的。

for abc in `chkconfig  --list|grep 3:on |awk '{print $1}'`; do chkconfig  --level 3 $abc  off ;done 
[root@sf106232 test]# for abc in  crond network rsyslog sshd sysstat ; do chkconfig --level 3 $abc on  ; done
[root@sf106232 test]# chkconfig --list|grep 3:on
crond          	0:off	1:off	2:on	3:on	4:on	5:on	6:off
network        	0:off	1:off	2:on	3:on	4:on	5:on	6:off
rsyslog        	0:off	1:off	2:off	3:on	4:off	5:off	6:off
sshd           	0:off	1:off	2:on	3:on	4:on	5:on	6:off
sysstat        	0:off	1:off	2:on	3:on	4:off	5:on	6:off

or
chkconfig  --list|grep 3:on |grep -vE "crond|sshd|network|rsyslog|sysstat"|awk '{print "chkconfig "  $1 "off"}' 

1到100的加法.

[root@sf106232 script]# sh 20170705.sh 
5050
[root@sf106232 script]# cat 20170705.sh 
#!/bin/sh
for ((i=1;i<=100;i++))
do 
    ((sum=sum+i))
done
echo $sum

数据库分库备份脚本开发使用。

#!/bin/bash
#*****************************************************
#         Author: suixiaofeng
#           blog:https://bk.devopstack.cn
#          Email: 258818040@qq.com 
#  Last modified: 2017-07-06 13:52
#       Filename: 20170706.sh
#    Description: 
#****************************************************
PATH="/usr/local/mysql/bin:$PATH"
DBPATH=/back
MYUSER=root
MYPASS=test
SOCKET=/db/mysql.sock 
MYCMD="mysql -u$MYUSER  -p$MYPASS -S $SOCKET"
MYSUMP="mysqldump -u$MYUSER -p$MYPASS -S $SOCKET"
mkdir $DBPATH/$(date +%F)
[ ! -d "$DBPATH" ] && mkdir $DBPATH
  for  dbname in `$MYCMD -e "show databases;" | sed '1,2d'| egrep -v "mysql|schema"`
    do 

          $MYSUMP  $dbname | gzip >$DBPATH/$(date +%F)/${dbname}_$(date +%F).sql.gz
        # $MYSUMP  $dbname  > $DBPATH/${dbname}_$(date +%F).sql
    done
备注:
mysqldump -u$MYUSER -p$MYPASS -S /db/mysql.sock  dbname |gzip > dbname.sql.gz  备份压缩

数据库分库分表备份脚本开发使用。

#!/bin/bash
#*****************************************************
#         Author: suixiaofeng
#           blog:https://bk.devopstack.cn
#          Email: 258818040@qq.com 
#  Last modified: 2017-07-06 13:52
#       Filename: 20170706.sh
#    Description: 
#****************************************************
PATH="/usr/local/mysql/bin:$PATH"
DBPATH=/u02/back
MYUSER=root
MYPASS=test
SOCKET=/tmp/mysql.sock 
MYCMD="mysql -u$MYUSER  -p$MYPASS -S $SOCKET"
MYSUMP="mysqldump -u$MYUSER -p$MYPASS -S $SOCKET"
[ ! -d "$DBPATH" ] && mkdir $DBPATH
  
  for  dbname in `$MYCMD -e "show databases;" | sed '1,2d'| egrep -v "mysql|schema"`
   do  
      mkdir $DBPATH/$(date +%F)/${dbname}  -p
      for table in `$MYCMD -e "show tables  from $dbname;"|sed '1d'`
          do
            $MYSUM $dbname $table |gzip >$DBPATH/$(date +%F)/${dbname}/${dbname}_${table}.sql.gz
          done
   done

生产环境下批量检查web服务是否正常,并发送邮件或者手机报警

#!/bin/bash
#*****************************************************
#         Author: suixiaofeng
#           blog:https://bk.devopstack.cn
#          Email: 258818040@qq.com 
#  Last modified: 2017-07-06 15:01
#       Filename: web_url.sh
#    Description: 
#****************************************************
path=/u02/script/script
MAIL_GROUP="Daniel_gtj@163.com  258818040@qq.com"
PAGER_GROUP="17621061569 18326885639"
LOG_FILE="/tmp/web_check.log"

[ ! -d "$path" ] && mkdir -p $path

function Url_LIST () {
    cat >$path/domain.list<<EOF
     https://bk.devopstack.cn
     http://cool360.org
     http://www.cool360.org
     http://7ipoint.cool360.org
EOF
}
function  CheckURL () {
 FAILCOUNT=0
   for ((i=1;i<=3;i++))
    do 
       wget -T 5 -q  --tries=1 --spider $1 >/dev/null 2>&1 
      if [ $? -ne 0 ] 
         then 
           let FAILCOUNT+=1;
         else 
           break
      fi   
  done
  return $FAILCOUNT   
}

function MAIL () {
    local   SUBJECT_CONTENT=$1
      for MAIL_USER in `echo $MAIL_GROUP`            
       do
           mail -s "$SUBJECT_CONTENT"  $MAIL_USER < $LOG_FILE
       done
}
function PAGER () {
     for PAGER_USER in `echo $PAGER_GROUP`
       do
        TITLE=$1
        CONTACT=$PAGER_GROUP
        HTTPPGW=http:  ##对应短信接口链接 
        ##send_message method
       curl -d cdkey=   -d password=  -d phone=$CONTACT -d message="$TITLE[$2]" $HTTPPGW    
       done
}
function   SendMSg() {
      if [ $1 -ge 3 ] 
        then 
          RETVAL=1
          NOW_TIME=`date +"%Y-%m-%d %H:%M:%S"`
          SUBJECT_CONTENT="http://$2 is error,${NOW_TIME}."
          echo -e "$SUBJECT_CONTENT" |tee $LOG_FILE
          MAIL $SUBJECT_CONTENT 
          PAGER $SUBJECT_CONTENT $NOW_TIME 
        else

         echo "$2 is ok"
         RETVAL=0
       fi
      return $RETVAL
}
function main() {
        Url_LIST
       for url in `cat $path/domain.list`
       do
           CheckURL $url  
           SendMSg $? $url 
       done

}
main

在这篇文章中写了简单的web_url检测脚本:https://bk.devopstack.cn/archives/746.html
备注:这个脚本函数相互之间联系比较紧密,值得好好学习。

获取数字加字母的随机数
[root@sf106232 script]# echo $RANDOM|md5sum |cut -c 1-10
9b1a6dc629

添加用户并设置随机密码

[root@sf106232 script]# cat  20170711.sh 
#!/bin/bash
#*****************************************************
#         Author: suixiaofeng
#           blog:https://bk.devopstack.cn
#          Email: 258818040@qq.com 
#  Last modified: 2017-07-11 15:20
#       Filename: 20170711.sh
#    Description: 
#****************************************************
. /etc/init.d/functions
user="test"
passfile="/tmp/user.log"
for num in `seq -w 11 15`
 do
   pass="`echo "test$RANDOM" |md5sum |cut -c 3-11`"
   useradd $user$num &>/dev/null &&\
   echo "$pass"|passwd --stdin $user$num &>/dev/null &&\
   echo  -e "user:$user$num\tpasswd:$pass" >>$passfile
   if [ $? -eq 0 ] 
    then 
         action  "$user$num is ok" /bin/true
    else 
          action  "$user$num is false" /bin/false
   fi
done 
 echo --------------------------------------------------
cat $passfile && >$passfile

结果:

[root@sf106232 script]# sh 20170711.sh 
test01 is ok                                               [  OK  ]
test02 is ok                                               [  OK  ]
test03 is ok                                               [  OK  ]
test04 is ok                                               [  OK  ]
test05 is ok                                               [  OK  ]
test06 is ok                                               [  OK  ]
test07 is ok                                               [  OK  ]
test08 is ok                                               [  OK  ]
test09 is ok                                               [  OK  ]
test10 is ok                                               [  OK  ]
test11 is false                                            [FAILED]
test12 is false                                            [FAILED]
test13 is false                                            [FAILED]
test14 is false                                            [FAILED]
test15 is false                                            [FAILED]
--------------------------------------------------
user:test01	passwd:4254ee218
user:test02	passwd:162204f72
user:test03	passwd:a4bdacff8
user:test04	passwd:4fc2261da
user:test05	passwd:b6cc21f98
user:test06	passwd:158e571a3
user:test07	passwd:d27c0fcb7
user:test08	passwd:2476823e5
user:test09	passwd:cbc65ba9e
user:test10	passwd:c30c4a6ae

select 循环语句

语法结构:
select 变量名 [in 菜单取值列表]
do
指令
done
例子:

#!/bin/bash
#*****************************************************
#         Author: suixiaofeng
#           blog:https://bk.devopstack.cn
#          Email: 258818040@qq.com 
#  Last modified: 2017-07-11 21:10
#       Filename: 2017071101.sh
#    Description: 
#****************************************************
select name in cool360 cool360.org   blog.cool360.org
do 
   echo $name
done
测试:
[root@sf106232 script]# sh  2017071101.sh 
1) cool360
2) cool360.org
3) blog.cool360.org
#? 

采用数组做变量列表:

f106232 script]# cat 2017071101.sh 
#!/bin/bash
#*****************************************************
#         Author: suixiaofeng
#           blog:https://bk.devopstack.cn
#          Email: 258818040@qq.com 
#  Last modified: 2017-07-11 21:10
#       Filename: 2017071101.sh
#    Description: 
#****************************************************
array=(cool cool360 cool360.org)
select name in "${array[@]}"
do 
   echo $name
done
结果:
[root@sf106232 script]# sh  2017071101.sh 
1) cool
2) cool360
3) cool360.org
#? 3
cool360.org
#? 

lnmp一键安装脚本select版

#         Author: suixiaofeng
#           blog:https://bk.devopstack.cn
#          Email: 258818040@qq.com 
#  Last modified: 2017-07-14 14:12
#       Filename: lnmp.sh
#    Description: 
#****************************************************
RETVAR=0
path=/u01/scripts
[ ! -d "$path" ]  && mkdir $path -p
function Usage() {
   echo "Usage:$0 argv"
   return 1
}
function InstallService() {

 if [ $# -ne 1 ] ; then
   Usage
 fi
local  RETVAR=0
echo "start installing ${1}."
sleep 2 ;
if [ ! -x "$path/${1}.sh" ] ; then
  echo " $path/${1}.sh does not exist or can  not be exec." 
  return 1
else
    $path/$${1}.sh
    return   $RETVAR
fi
}
function main () {
       PS3="`echo pls input the num you want:`"
       select   var in "Install lamp" "Install lnmp" "exit"
       do
          case "$var" in
           "Install lamp")
                 InstallService  lamp
                 RETVAR=$?
                 ;;
            "Install lnmp")
                  InstallService  lnmp
                  RETVAR=$?
                  ;;
              exit)
                  echo bye.
                  return 3
                  ;;
              *)

                 echo "the num you input must be {1|2|3}"
                 echo "Input ERROR."
        esac
    done
exit $RETVAR
}
main

测试:

[root@sf106232 scripts]# sh  lnmp.sh 
1) Install lamp
2) Install lnmp
3) exit
pls input the num you want:2
start installing lnmp.
 /u01/scripts/lnmp.sh does not exist or can  not be exec.
pls input the num you want:

方法2.


#!/bin/bash
#*****************************************************
#         Author: suixiaofeng
#           blog:https://bk.devopstack.cn
#          Email: 258818040@qq.com 
#  Last modified: 2017-07-14 14:12
#       Filename: lnmp.sh
#    Description: 
#****************************************************
RETVAR=0
path=/u01/scripts
[ ! -d "$path" ]  && mkdir $path -p 
function Usage() {
   echo "Usage:$0 argv"
   return 1
}
function InstallService() {

 if [ $# -ne 1 ] ; then
   Usage
 fi
local  RETVAR=0
echo "start installing ${1}."
sleep 2 ;
if [ ! -x "$path/${1}.sh" ] ; then 
  echo " $path/${1}.sh does not exist or can  not be exec." 
  return 1
else 
    $path/$${1}.sh
    return   $RETVAR
fi  
}
function main () {
       PS3="`echo pls input the num you want:`"
       select   var in "Install lamp" "Install lnmp" "exit"
       do 
          case "$REPLY" in
           1) 
                 InstallService  lamp
                 RETVAR=$?
                 ;;
            2) 
                  InstallService  lnmp
                  RETVAR=$?
                  ;;
             3)
                  echo bye.
                  return 3
                  ;;
              *)

                 echo "the num you input must be {1|2|3}"
                 echo "Input ERROR."
        esac
    done
exit $RETVAR
}
main 

sh lnmp.sh   
1) Install lamp
2) Install lnmp
3) exit
pls input the num you want:1
start installing lamp.
 /u01/scripts/lamp.sh does not exist or can  not be exec.
pls input the num you want:2
start installing lnmp.
 /u01/scripts/lnmp.sh does not exist or can  not be exec.
pls input the num you want:3
bye.
备注:select有两个重要的变量,一个是PS3,一个是$REPLY.
PS3:打印提示信息。
PEPLY:获取菜单对应的数字,用来在case里调用。

循环控制状态返回值实践

给网卡配置子ip.

例子:
#!/bin/bash
#*****************************************************
#         Author: suixiaofeng
#           blog:https://bk.devopstack.cn
#          Email: 258818040@qq.com 
#  Last modified: 2017-07-14 19:59
#       Filename: ip_add_del.sh
#    Description: 
#****************************************************
#!/bin/bash
[ -f /etc/init.d/functions ] && . /etc/init.d/functions
RETVAL=0
op() {

if [ "$1" == "del" ] ; then
   list=`echo {16..1}`
else
   list=`echo {1..16}`
fi
for ip in  $list
do 
  if [ $ip -eq 10 ]
     then 
   continue
 fi

   ip addr $1 10.0.2.$ip/24 dev eth0 label eth0:$ip &>/dev/null
   RETVAL=$?
   if [ $RETVAL -eq 0 ]
    then 
     action "$1 $ip" /bin/true
    else 
    action "$1 $ip"  /bin/false
  fi

done
return $RETVAL
}
 case "$1" in 
      start)
         op add
         RETVAL=$?
         ;;
      stop)
         op del
         RETVAL=$?
         ;;
      restart)
         op del
         sleep 2
         op add
         RETVAL=$?
         ;;
       *)
         echo $"USAGE:$0 {start|stop|restart}"
 esac
exit $RETVAL  

[root@sf106232 scripts]# sh ip_add_del.sh  start
add 1                                                      [  OK  ]
add 2                                                      [  OK  ]
add 3                                                      [  OK  ]
add 4                                                      [  OK  ]
add 5                                                      [  OK  ]
add 6                                                      [  OK  ]
add 7                                                      [  OK  ]
add 8                                                      [  OK  ]
add 9                                                      [  OK  ]
add 11                                                     [  OK  ]
add 12                                                     [  OK  ]
add 13                                                     [  OK  ]
add 14                                                     [  OK  ]
add 15                                                     [  OK  ]
add 16                                                     [  OK  ]
[root@sf106232 scripts]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:50:56:9C:3B:F2  
          inet addr:10.19.106.232  Bcast:10.19.106.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:26215297 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16254411 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:2901795004 (2.7 GiB)  TX bytes:2101024325 (1.9 GiB)

eth0:1    Link encap:Ethernet  HWaddr 00:50:56:9C:3B:F2  
          inet addr:10.0.2.1  Bcast:0.0.0.0  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:2    Link encap:Ethernet  HWaddr 00:50:56:9C:3B:F2  
          inet addr:10.0.2.2  Bcast:0.0.0.0  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:3    Link encap:Ethernet  HWaddr 00:50:56:9C:3B:F2  
          inet addr:10.0.2.3  Bcast:0.0.0.0  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:4    Link encap:Ethernet  HWaddr 00:50:56:9C:3B:F2  
          inet addr:10.0.2.4  Bcast:0.0.0.0  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:5    Link encap:Ethernet  HWaddr 00:50:56:9C:3B:F2  

MD5sum加密后破解

#!/bin/bash
#*****************************************************
#         Author: suixiaofeng
#           blog:https://bk.devopstack.cn
#          Email: 258818040@qq.com 
#  Last modified: 2017-07-14 21:18
#       Filename: md5sum.sh
#    Description: 
#****************************************************
for n in {0..32767}
 do 
     echo "`echo $n |md5sum` $n" >> /tmp/zhiwen.log
done
md5char="04fe8bf20edfc"
while read line
  do 

    if [ `echo $line|grep "$md5char"|wc -l ` -eq 1 ]
       then 
         echo $line
         break
   fi
done </tmp/zhiwen.log
[root@sf106232 scripts]# sh  md5sum.sh 
1dcca23355272056f04fe8bf20edfce0 - 5
[root@sf106232 scripts]# sh  md5sum.sh 

shell中的数组

语法:
array=( value1 value2 value3 ..)

[root@sf106232 scripts]# array=(1 2 3)
[root@sf106232 scripts]# echo ${array[*]}
1 2 3
[root@sf106232 scripts]# echo ${array[@]}
1 2 3
[root@sf106232 scripts]# array=([1]=one [2]=two [3]=3)
[root@sf106232 scripts]# echo ${array[2]}
two
[root@sf106232 scripts]# echo ${array[3]}
3
[root@sf106232 scripts]# echo ${array[1]}
one
动态定义数组变量
[root@sf106232 scripts]# array=(`ls `)
[root@sf106232 scripts]# echo  ${array[@]}
ip_add_del.sh lnmp1.sh lnmp.sh md5sum.sh
[root@sf106232 scripts]# echo  ${array[1]}
lnmp1.sh
[root@sf106232 scripts]# echo  ${array[0]}
ip_add_del.sh、
数组赋值:
[root@sf106232 scripts]# array[4]=testtest
[root@sf106232 scripts]# echo  ${array[*]}
ip_add_del.sh lnmp1.sh lnmp.sh md5sum.sh testtest
数组删除:
[root@sf106232 scripts]# unset  array[1]
[root@sf106232 scripts]# echo  ${array[*]}
ip_add_del.sh lnmp.sh md5sum.sh testtest
删除整个数组
[root@sf106232 scripts]# unset array
[root@sf106232 scripts]# echo  ${array[*]}
数组截取
[root@sf106232 scripts]# array=(1 2 3 4 5)
[root@sf106232 scripts]# echo ${array[@]:0:2}
1 2
数组替换
[root@sf106232 scripts]# echo ${array[@]}
1 2 3 4 5
[root@sf106232 scripts]# echo ${array[@]/2/c}
1 c 3 4 5
[root@sf106232 scripts]# echo ${array[@]/1/c}
c 2 3 4 5
[root@sf106232 scripts]# array=(1 2 3 4 5 5 5)
[root@sf106232 scripts]# echo ${array[@]/5/c}
1 2 3 4 c c c


[root@sf106232 scripts]# cat array.sh 
#!/bin/bash
array=(a b c d  e)
for((i=0; i<${#array[@]};i++))
   do  
    echo ${array[i]}
 done
[root@sf106232 scripts]# sh  array.sh 
a
b
c
d
e
[root@sf106232 scripts]# cat array.sh 
#!/bin/bash
array=(a b c d  e)
i=0
while ((i<${#array[@]}))
do    
  echo ${array[i]}
    ((i++))
 done

[root@sf106232 scripts]# array=($(ls))
[root@sf106232 scripts]# echo ${array[@]}
array.sh ip_add_del.sh lnmp1.sh lnmp.sh md5sum.sh   

mysql主从检查报警脚本

#!/bin/bash
path=/u02/scripts
MAIL_GROUP="258818040@qq.com 258818041@qq.com"
PAGER_GROUP="1111111111    22222222222"
LOG_FILE="/tmp/web_check.log"
USER=root
PASSWORD=test
PORT=3306
MYSQLCMD="mysql -u$USER -p$PASSWORD -S /data/$PORT/mysql.sock"
error=(1008 1007 1062)
RETVAL=0
[ ! -d $path ] && mkdir -p $path
 
function JudgeError(){
for((i=0;i<${#error[*]};i++))
do
  if [ "$1" == "${error[$i]}" ]
    then
      echo "MySQL slave errorno is $1,auto repairing it."
      $MYSQLCMD -e "stop slave;set global sql_slave_skip_counter=1;start slave;"
  fi
done
return $1
}
 
function CheckDb(){
status=($(awk -F ': ' '/_Running|Last_Errno|_Behind/{print $NF}' slave.log))
 expr ${status[3]} + 1 &>/dev/null
 if [ $? -ne 0 ];then
    status[3]=300
 fi
 if [ "${status[0]}" == "Yes" -a "${status[1]}" == "Yes" -a ${status[3]} -lt 120 ]
  then
    #echo "Mysql slave status is ok"
    return 0
  else
    #echo "mysql replcation is failed"
    JudgeError ${status[2]}
  fi
}
 
function MAIL(){
local SUBJECT_CONTENT=$1
for MAIL_USER  in `echo $MAIL_GROUP`
 do
    mail -s "$SUBJECT_CONTENT " $MAIL_USER <$LOG_FILE
done
}
function PAGER(){
for PAGER_USER  in `echo $PAGER_GROUP`
do
 TITLE=$1   
 CONTACT=$PAGER_USER
 HTTPGW=
 #send_message method1
 curl -d 
done
}
function SendMsg(){
  if [ $1 -ne 0 ]
    then 
       RETVAL=1
       NOW_TIME=`date +"%Y-%m-%d %H:%M:%S"`
       SUBJECT_CONTENT="mysql slave is error,errorno is $2,${NOW_TIME}."
       echo -e "$SUBJECT_CONTENT"|tee $LOG_FILE
       MAIL $SUBJECT_CONTENT
       PAGER $SUBJECT_CONTENT $NOW_TIME
  else
      echo "Mysql slave status is ok"
      RETVAL=0
  fi
  return $RETVAL
}
function main(){
while true
do
   CheckDb
   SendMsg $? 
   sleep 300
done
}
main
sh -n 可以调试脚本语法
sh -v
sh -x
set -n 读命令不执行
set -v 显示读取的所有行
set -x 显示所有命令和参数,一般写在脚本里面开启,set +x 终止调试。可以局部调试。
[root@sf106232 scripts]# sh -n  lnmp.sh 
lnmp.sh: line 73: syntax error: unexpected end of file
改正之后:
[root@sf106232 scripts]# vim lnmp.sh 
[root@sf106232 scripts]# sh -n  lnmp.sh 
注释:用vim编辑器 在Esc模式下 可以按v限定调整格式的行数然后按=号调整代码的格式。操作不可逆。

博主

这货来去如风,什么鬼都没留下!!!

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