學(xué)習(xí)shell編程，做了一個檢測MYSQL時候啟動的腳本，剛學(xué)SHELL沒幾天，歡迎大家給意見和建議

# !bin/bash
MYSQLPID='/var/run/mysqld/mysqld.pid';

if [ ! -f $MYSQLPID ] ; then
    service mysqld start &>> mysql.error.log;

    if [ $? -ne 0 ] ; then
        for i in $(ps -ef grep mysqld   grep -v grep   awk '{print $2}')
        do
            kill -9 $i;
        done

        service mysqld start &>> mysql.error.log;
    fi   
    exit;
fi
             
PID=$(tail $MYSQLPID); 

if [[ X$PID -eq X ]] ; then
    rm -rf $MYSQLPID;
    
    if [ $? -eq 0 ] ; then 
        for i in $(ps -ef grep mysqld   grep -v grep  awk '{print $2}')
        do
            kill -9 $i;
        done
    
        service mysqld stop  &>> mysql.error.log;
        service mysqld start &>> mysql.error.log;
    else
        echo "MYSQL PID 文件刪除失敗. " 1>> mysql.error.log
    fi
fi

以上就是一個簡單的MYSQL檢測實例代碼的詳細(xì)內(nèi)容，更多請關(guān)注php中文網(wǎng)其它相關(guān)文章！