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shell腳本編寫

shell語法

summary

編寫shell腳本時(shí)，需要聲明這是一個(gè)腳本文件#!/bin/bash
聲明作者，和編寫日期。
NOTE：盡可能詳細(xì)的寫出腳本的功能，做好注釋。shell的可讀性不是很好，因此強(qiáng)烈建議編寫注釋。

Hello World

#!/bin/bash
# this is a annotation
# auto echo hello world!
# by authors nulijiushimeili 2015
echo "hello world!"
echo -e "\033[32mPlease select Menu follow:\033[0m"
echo "1)installing apache server."
echo "2)installing mysql server."
echo "3)installing php server."
echo "4)deploying lamp web goals."
echo -e "\033[32m-----------------------------------------\033[0m"

獲得執(zhí)行的結(jié)果信息

當(dāng)狀態(tài)碼等于0時(shí)表示執(zhí)行成功，否則表示命令執(zhí)行失敗

#!/bin/bash
# 測(cè)試一條命令的執(zhí)行結(jié)果
# 2019-02-19

service iptables stop

# 第一種寫法，-eq 表示 =
if [ $? -eq 0 ]; then
    echo "success!"
else
    echo "failed!"
fi

# 第二種寫法，-ne 表示 !=
if [ $? -ne 0 ]; then
    echo "failed!"
else
    echo "success!"
fi

將命令執(zhí)行的結(jié)果返回給一個(gè)變量。

#!/bin/bash
# 得到執(zhí)行命令的結(jié)果

res=`ps -ef | grep mysql-server`
echo $res

變量的使用

#!/bin/bash
# define path variables
name="Tom"
echo "$name"
echo "This is my name $name."
# shell process id.
echo $UID
# shell home
echo $PWD
echo "#######################"
# the first paramiter
echo $0
# the second paramiter
echo $1 $2
echo "#########################"
# expresses shell running ok
echo "The \$? is $?"
# get all parameters
echo "The \$* is $*"
# return how much params 
echo "The \$# is $#"

if 語句

#!/bin/bash
# auto if test
# by author nulijiushimeili 2015

num1=$1
num2=$2
if (($#<2));then
    echo "Usage: if.sh param1 param2."
    echo "wrong input !!!"
else 
    if(($num1>$num2));then
        echo "This $num1 greate $num2 !"
    elif(($num1<$num2));then
        echo "This $num1 little $num2 !"
    else
        echo "The $num1 equals $num2 !"
    fi
fi

# check and mkdir
dir=temp
if [ ! -d $dir ];then
        mkdir -p $dir
        echo "create dir $dir success!"
else
        echo "$dir is exists."
fi

elseif 語句

#!/bin/bash
# if else test demo
# by author nulijiushimeili

scores=$1
if (($#>0));then
    if [[$scores -gt 85]];then
        echo "Very good!";
    elif [[$scores -gt 70]];then
        echo "good";
    elif [[$scores -gt 60]];then
        echo "pass";
    else 
        echo "so bad!";
    fi
else
    echo "Usage: elif.sh param1";
fi

for語句

#!/bin/bash
# test for
# by author nulijiushimeili 2015

# first test
for i in {1..5}
do
    echo $i
done

# second test
for i in 6 7 8 9 10
do
    echo $i
done

# third test
for FILE in $HOME/*
do
    echo $FILE
done

# high order usage
for((i=0;i<10;i++))
do
    echo $i
done

while 語句

#!/bin/bash
# test while loop
# by author nulijiushimeili

# print number from 1 to 5
counter=0
while [ $counter -lt 5 ]
do
    counter=`expr $counter + 1`
    echo $counter
done

# print input number in while loop 
echo "please input a number."
echo "ctrl + d to exit."
while read FILM
do
    echo "Yeah! great film the $FILM"
done

case語句

#!/bin/bash
# test case
# by author nulijiushimeili 2015

#if(($#>0))
if [ $# -gt 0 ]
then
    case $1 in
    1)
        echo "one"
        ;;
    2)
        echo "two"
        ;;
    3)
        echo "three"
        ;;
    4)
        echo "four"
        ;;
    *)
        echo -e "\033[32mNothing to matched.\033[0m"
        ;;  
    esac
else
    echo "Must to input a number parameter."
    echo "please input a number in {1,2,3,4}."
    echo "Usage: case.sh 1"
fi

shell函數(shù)

#!/bin/bash
# test function
# by author nulijiushimeili

# 聲明一個(gè)方法
print(){
    echo "hello word."
}

# 調(diào)用方法
print

test(){
    num1=3
    num2=4
    return $(($num1 + $num2))
}

test
result=$?
echo $result

按行讀取文件

#!/bin/base
# read file and get each line
# by author nulijiushimeili 2017

# -r express : allow special charactor
while read -r line
do
    echo $line
done </opt/datas/emp.txt


# test add 
i=1
sum=0
while ((i<10))
do
    sum=$((sum=i+$sum))
    i=$[i+1]
done
echo $sum

shell 編程知識(shí)

輸出帶顏色的打印信息

# 輸出帶顏色的打印信息
echo -e "\033[32m------\033[0m"
# 輸出黑底白字的信息
echo -e "\033[40,37m------\033[0m"

字體顏色設(shè)置

# 字體顏色設(shè)置
echo -e “\033[30m 黑色字 \033[0m”
echo -e “\033[31m 紅色字 \033[0m”
echo -e “\033[32m 綠色字 \033[0m”
echo -e “\033[33m 黃色字 \033[0m”
echo -e “\033[34m 藍(lán)色字 \033[0m”
echo -e “\033[35m 紫色字 \033[0m”
echo -e “\033[36m 天藍(lán)字 \033[0m”
echo -e “\033[37m 白色字 \033[0m”

字體底色設(shè)置

# 字體底色設(shè)置
echo -e “\033[40;37m 黑底白字 \033[0m”
echo -e “\033[41;37m 紅底白字 \033[0m”
echo -e “\033[42;37m 綠底白字 \033[0m”
echo -e “\033[43;37m 黃底白字 \033[0m”
echo -e “\033[44;37m 藍(lán)底白字 \033[0m”
echo -e “\033[45;37m 紫底白字 \033[0m”
echo -e “\033[46;37m 天藍(lán)底白字 \033[0m”
echo -e “\033[47;30m 白底黑字 \033[0m”

特殊參數(shù)

# 參數(shù)
$# 參數(shù)的個(gè)數(shù)
$? shell 腳本運(yùn)行返回值,OK返回0
$* 所有的參數(shù)

$UID 用戶id,root的uid=0
$PWD 當(dāng)前文件夾絕對(duì)路徑

邏輯運(yùn)算符解析

# 邏輯運(yùn)算符解析
-f  判斷文件是否存在
-d  判斷目錄是否存在
-eq 等于,應(yīng)用于整型數(shù)值比較
-ne 不等于,應(yīng)用于整型數(shù)值比較
-lt 小于,應(yīng)用于整型數(shù)值比較
-gt 大于,應(yīng)用于整型數(shù)值比較
-le 小于或等于,應(yīng)用于整型數(shù)值比較
-ge 大于或等于,應(yīng)用于整型數(shù)值比較
-a  雙方都成立(and)  condition1 -a condition2
-o  單方成立(or) condition1 -o condition2
-z  空字符串

測(cè)試腳本編寫是否正確

/bin/bash -n if.sh      # 如果沒有輸出任何東西表示腳本編寫正確

文件IO

# 將結(jié)果寫入文件，結(jié)果不會(huì)在控制臺(tái)展示，而是在文件中，覆蓋寫
$ echo result > file
# 將結(jié)果寫入文件，結(jié)果不會(huì)在控制臺(tái)展示，而是在文件中，追加寫
$ echo result >> file
echo input < file  #獲取輸入流

一些練習(xí)的小例子

自動(dòng)備份mysql數(shù)據(jù)庫

#!/bin/bash
# auto backup mysql db
# by author nulijiushimeili 2015
# define backup path

bak_dir=/opt/datas/mysql_backup/`date +%Y%m%d`
mysql_db=sqoop
mysql_user=root
mysql_pwd=123456
mysql_cmd=/usr/bin/mysqldump

if [ $UID -ne 0 ]
then
 echo "Must to be use root for exec shell."
 exit
fi

if [ ! -d $bak_dir ]
then
 mkdir -p $bak_dir
 echo -e "\033[32mThe $bak_dir create successfully!\033[0m"
else
 echo "This $bak_dir is exists ..."
fi

# mysql backup cmd.
mysqldump -u$mysql_user -p$mysql_pwd -d $mysql_db >$bak_dir/$mysql_db.sh

if [ $? -eq 0 ]
then
 echo -e "\033[32mThe mysql backup $mysql_db successfully!\033[0m" 
else
 echo -e "\033[32mThe mysql backup $mysql_db failed, please check.\033[0m"
fi

玩具程序：設(shè)置環(huán)境變量（第一版）

#!/bin/bash
# set env
# by author nulijiushimeili 2017

time=`date +%Y%m%d%H%M%S`
new_profile="profile_$time"

echo $new_profile

if [ $UID -ne 0 ]
then
  echo "Must to be use root to exec shell."
  exit
fi

if [ $1 == "help" ]
      then
          echo "Usage: set-env.sh JAVE_HOME."
          echo "Usage: set-env.sh help for help."
          exit
fi

echo "Are you sure to append this dir to envirement virable?"
echo "input y to continue and copy /etc/profile to $new_profile, the new file will as a backup for /etc/profile, if you want to use the old profile, you can rename the histry profile to 'profile'."
echo "continue to input 'y', and input 'n' for exit.[y|n]?"
read create_file_yes_or_no
if [ $create_file_yes_or_no == "y" ] 
then
  sudo cp /etc/profile /etc/$new_profile
  if [ $? -eq 0 ]
  then
      echo "create new profile success."
      if [ $# -gt 0 ]
      then
          # content=echo "# $1%nexport $1=$PWD%nexport PATH=\$PATH=\$PATH:\$$1/bin"
          sh="export PATH=\$PATH:\$$1/bin"
          home="export $1=$PWD"
          annotation="# $1"
          echo "append env variable to profile..."
          echo "the variable is :"
          echo "$annotation"
          echo "$home"
          echo "$sh"
          echo "It is appending now,please comfirm agagin:"
          echo "continue to input 'y', and input 'n' for exit.[y|n]?"
          read get_yes_or_no
          if [ $get_yes_or_no == "y" ]
          then
              sudo sed -i "4i\ \n" /etc/profile
              sudo sed -i "4i\\$sh" /etc/profile
              sudo sed -i "4i\\$home" /etc/profile
              sudo sed -i "4i\\$annotation" /etc/profile
              sudo source /etc/profile
              echo "$1 envirement virable was setted successfully!"
              echo "$1"
          else
              echo "exit!"
              exit
          fi
      else
          echo "Usage: set-env.sh JAVE_HOME."
          echo "Usage: set-env.sh help for help."
          exit
      fi
  else
      echo "create new profile failed. please to check ..."
  fi
else
  echo "exit!"
  exit
fi

  3. 玩具程序： 設(shè)置環(huán)境變量（第二版）

  ```shell
  #!/bin/babin
  # set env
  # by author nulijiubinimeili 2017
  
  time=`date +%Y%m%d%H%M%S`
  new_profile="profile_$time"
  
  
  echo "will create new profile $new_profile for backup."
  
  # check user, must be root
  if [ $UID -ne 0 ]
  then
    echo "Must to be use root to exec shell."
    exit
  fi
  
  # help info
  if [ $1 == "help" ]
        then
            echo "Usage: set-env.bin JAVE_HOME.(requer: this binell must in the java home directory.)"
            echo "Usage: set-env.bin /opt/modules/jdk1.8.0_161 JAVE_HOME"
            echo "Usage: set-env.bin help"
            exit
  fi
  
  echo "Appending this dir to envirement virable."
  echo "input y to continue and copy /etc/profile to $new_profile, the new file will as a backup for /etc/profile, if you want to use the old profile, you can rename the histry profile to 'profile'."
  echo "continue to input 'y', and input 'n' for exit.[y|n]?"
  read create_file_yes_or_no
  if [ $create_file_yes_or_no == "y" ] 
  then
    sudo cp /etc/profile /etc/$new_profile
    if [ $? -eq 0 ]
    then
        echo "create new profile success."
        if [ $# -eq 1 ]
        then
            # Must contains a bin directory in current path.
            if [ ! -d $PWD/bin ]
            then
                    echo -e "\033[32mWithout 'bin' directory in current path,pleash check.\033[0m"
                    exit
            fi
            # content=echo "# $1%nexport $1=$PWD%nexport PATH=\$PATH:\$$1/bin"
            echo "Recommend: set-env.x.x.x.sh /path XXX_HOME"
            bin="export PATH=\$PATH:\$$1/bin"
            home="export $1=$PWD"
            annotation="# $1"
            echo "append env variable to profile..."
            echo "the variable is :"
            echo -e "\033[32m$annotation\033[0m"
            echo -e "\033[32m$home\033[0m"
            echo -e "\033[32m$bin\033[0m"
            echo "It is appending now,please comfirm agagin:"
            echo "continue to input 'y', and input 'n' for exit.[y|n]?"
            read get_yes_or_no
            if [ $get_yes_or_no == "y" ]
            then
                sudo sed -i "4i\ \n" /etc/profile
                sudo sed -i "4i\\$bin" /etc/profile
                sudo sed -i "4i\\$home" /etc/profile
                sudo sed -i "4i\\$annotation" /etc/profile
                source /etc/profile
                echo "$1 envirement virable was setted successfully!"
                echo -e "\033[32mplease exec 'source /etc/profile' by yourself.\033[0m"
            else
                echo "exit!"
                exit
            fi
        elif [ $# == 2 ]
        then
            # content=echo "# $2%nexport $2=$PWD%nexport PATH=\$PATH:\$$2/bin"
            bin="export PATH=\$PATH:\$$2/bin"
            home="export $2=$1"
            annotation="# $2"
            echo "append env variable to profile..."
            echo "the variable is :"
            echo -e "\033[32m$annotation\033[0m"
            echo -e "\033[32m$home\033[0m"
            echo -e "\033[32m$bin\033[0m"
            echo "It is appending now,please comfirm agagin:"
            echo "continue to input 'y', and input 'n' for exit.[y|n]?"
            read get_yes_or_no
            if [ $get_yes_or_no == "y" ]
            then
                sudo sed -i "4i\\$bin" /etc/profile
                sudo sed -i "4i\\$home" /etc/profile
                sudo sed -i "4i\\$annotation" /etc/profile
                sudo sed -i "4i\ \n" /etc/profile
                source /etc/profile
                echo "$1 envirement virable was setted successfully!"
                echo -e "\033[32mplease exec 'source /etc/profile' by yourself.\033[0m"
            else
                echo "exit!"
                exit
            fi
        else
            echo "Usage: set-env.bin JAVE_HOME.(requer: this binell must in the java home directory.)"
            echo "Usage: set-env.bin /opt/modules/jdk1.8.0_161 JAVE_HOME"
            echo "Usage: set-env.bin help"
            exit
        fi
    else
        echo "create new profile failed. please to check ..."
    fi
  else
    echo "exit!"
    exit
  fi
  
  
  ```

  4. git 提交

  ```shell
  #!/bin/bash
  # git commit project
  # by author nulijiushimeili
  
  echo "start running shell"
  git add .
  if (($#>0));
  then
    git commit -m $1
  else
    echo "Usage: gitcommit.sh param1"
  fi
  git push orgin master
  
  if (($?==0))
  then
    echo "commit success."
  else
    echo "commit failed, please try to again."
  fi
  ```

  5. 啟動(dòng)Tomcat

  ```shell
  #!/bin/bash
  # 啟動(dòng)Tomcat
  tomPath=/usr/local/soft/tom7
  # sh ${tomPath}/bin/shutdown.sh
  # 作為參數(shù)返回 查找的進(jìn)程ID 
  id=`ps -ef |grep tomcat |grep -v 'auto tomcat'|awk '{print $2}'`
  kill -9 $id
  rm -rf /usr/local/soft/tom7/webapps/ROOT*
  cp  /home/grq/data/ROOT.war /usr/local/soft/tom7/webapps/
  sh ${tomPath}/bin/startup.sh
  
  
  # 作為參數(shù)返回 查找的進(jìn)程ID 
  id=$(ps -ef |grep tomcat |grep -v 'auto tomcat'|awk '{print $2}')
  
  ```

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shell腳本編寫

shell腳本編寫

shell腳本編寫

shell語法

summary

Hello World

獲得執(zhí)行的結(jié)果信息

變量的使用

if 語句

elseif 語句

for語句

while 語句

case語句

shell函數(shù)

按行讀取文件

shell 編程知識(shí)

輸出帶顏色的打印信息

字體顏色設(shè)置

字體底色設(shè)置

特殊參數(shù)

邏輯運(yùn)算符解析

測(cè)試腳本編寫是否正確

文件IO

一些練習(xí)的小例子

相關(guān)閱讀更多精彩內(nèi)容

友情鏈接更多精彩內(nèi)容

色偷偷精品伊人,欧洲久久精品,欧美综合婷婷骚逼,国产AV主播,国产最新探花在线,九色在线视频一区,伊人大交九 欧美,1769亚洲,黄色成人av

shell腳本編寫

shell腳本編寫

shell語法

summary

Hello World

獲得執(zhí)行的結(jié)果信息

變量的使用

if 語句

elseif 語句

for語句

while 語句

case語句

shell函數(shù)

按行讀取文件

shell 編程知識(shí)

輸出帶顏色的打印信息

字體顏色設(shè)置

字體底色設(shè)置

特殊參數(shù)

邏輯運(yùn)算符解析

測(cè)試腳本編寫是否正確

文件IO

一些練習(xí)的小例子

相關(guān)閱讀更多精彩內(nèi)容

友情鏈接更多精彩內(nèi)容

色偷偷精品伊人,欧洲久久精品,欧美综合婷婷骚逼,国产AV主播,国产最新探花在线,九色在线视频一区,伊人大交九欧美,1769亚洲,黄色成人av