Shell脚本中长语句换行

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如下面shell判断语句很长且不易读，如能在适当位置换行则显得整齐易读,而换行的标准说法应当是。

修改前：

单行长语句
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if cat /etc/SuSE-release | grep -i "suse" >/dev/null 2>&1 && [ `cat /etc/SuSE-release | grep "VERSION" | awk '{print $3}'` == "12" ] && [ `cat /etc/SuSE-release |grep "PATCHLEVEL" | awk '{print $3}'` == "4" ];then echo "This system is SUSE 12 SP4" else echo "This system is noe SUSE 12 SP4" fi

修改后：

分行写的语句
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if cat /etc/SuSE-release | grep -i "suse" >/dev/null 2>&1 && \ 
    [ `cat /etc/SuSE-release | grep "VERSION" | awk '{print $3}'` == "12" ] && \ 
    [ `cat /etc/SuSE-release |grep "PATCHLEVEL" | awk '{print $3}'` == "4" ];
then 
    echo "This system is SUSE 12 SP4" else echo "This system is noe SUSE 12 SP4" 
fi

操作步骤：

在需要换行的位置加 "\" ,然后直接按回车键