使用echo / linux导出多行代码而无需更改 [英] Exporting multiple line code without changes using echo / linux

问题描述

System CentOS 7.2
寻找一种无需更改即可将多行代码写入文件的解决方案

System CentOS 7.2 Looking for a solution to write multi line code to a file without changes

小段代码：

echo '
sed -i $'45 a \n' /usr/local/nagios/etc/nagios.cfg &&
sed -i $'45 a \n' /usr/local/nagios/etc/nagios.cfg &&
sed -i $'45 a \n' /usr/local/nagios/etc/nagios.cfg &&
sed -i '46s#.*#cfg_file=/usr/local/nagios/etc/hosts.cfg#' /usr/local/nagios/etc/nagios.cfg &&
sed -i '47s#.*#cfg_file=/usr/local/nagios/etc/services.cfg#' /usr/local/nagios/etc/nagios.cfg &&
sed -i $'48 a \n' /usr/local/nagios/etc/nagios.cfg &&
' >> output.sh

所需的输出：

sed -i $'45 a \n' /usr/local/nagios/etc/nagios.cfg &&
sed -i $'45 a \n' /usr/local/nagios/etc/nagios.cfg &&
sed -i $'45 a \n' /usr/local/nagios/etc/nagios.cfg &&
sed -i '46s#.*#cfg_file=/usr/local/nagios/etc/hosts.cfg#' /usr/local/nagios/etc/nagios.cfg &&
sed -i '47s#.*#cfg_file=/usr/local/nagios/etc/services.cfg#' /usr/local/nagios/etc/nagios.cfg &&
sed -i $'48 a \n' /usr/local/nagios/etc/nagios.cfg &&

我得到的是：

sed -i $45 a n /usr/local/nagios/etc/nagios.cfg &&
sed -i $45 a n /usr/local/nagios/etc/nagios.cfg &&
sed -i $45 a n /usr/local/nagios/etc/nagios.cfg &&
sed -i 46s#.*#cfg_file=/usr/local/nagios/etc/hosts.cfg# /usr/local/nagios/etc/nagios.cfg &&
sed -i 47s#.*#cfg_file=/usr/local/nagios/etc/services.cfg# /usr/local/nagios/etc/nagios.cfg &&
sed -i $48 a n /usr/local/nagios/etc/nagios.cfg &&

您可以看到报价消失，无论我使用带回声的单引号还是双引号。可能有ECHO以外的其他解决方案或某种通用括号来使写入文件时代码保持不变吗？

as you can see Quotes are disappearing, no matter I'm using single quote or double quote with echo. may be there is an other solution than ECHO or some sort of universal brackets to keep code unchanged when writing to the file?

推荐答案

cat <<EOF >> output.sh
sed -i $'45 a \n' /usr/local/nagios/etc/nagios.cfg &&
sed -i $'45 a \n' /usr/local/nagios/etc/nagios.cfg &&
sed -i $'45 a \n' /usr/local/nagios/etc/nagios.cfg &&
sed -i '46s#.*#cfg_file=/usr/local/nagios/etc/hosts.cfg#' /usr/local/nagios/etc/nagios.cfg &&
sed -i '47s#.*#cfg_file=/usr/local/nagios/etc/services.cfg#' /usr/local/nagios/etc/nagios.cfg &&
sed -i $'48 a \n' /usr/local/nagios/etc/nagios.cfg &&
EOF

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