linux - 通过 shell 脚本将 "raw"命令行添加到 bashrc(不评估命令)

Question

也许我搜索错了，但我找不到任何解决方案......
我想使用 shell 脚本将以下内容附加到我的 bashrc 文件中(以便更轻松地安装适用于 Linux 的 Windows 子系统):

# Load X display (run 'XLaunch' on Windows with 'Disable access control' checked and 'Native opengl' unchecked!)
# https://sourceforge.net/projects/vcxsrv/
export DISPLAY=$(grep -m 1 nameserver /etc/resolv.conf | awk '{print $2}'):0.0

这是我的 script.sh:

### Add useful stuff to bashrc
### --------------------------
echo "
# Load X display (run 'XLaunch' on Windows with 'Disable access control' checked and 'Native opengl' unchecked!)
# https://sourceforge.net/projects/vcxsrv/
export DISPLAY=$(grep -m 1 nameserver /etc/resolv.conf | awk '{print $2}'):0.0
" >> ~/.bashrc

这是运行 script.sh 时附加到 bashrc 的内容:

# Load X display (run 'XLaunch' on Windows with 'Disable access control' checked and 'Native opengl' unchecked!)
# https://sourceforge.net/projects/vcxsrv/
export DISPLAY=172.19.96.1:0.0

由于我的 IP 可能会改变，我想将原始命令本身附加到 bashrc，而不是命令的输出。我确信这一定是一个重复的问题，但我找不到有用的答案。有很多答案只是引用 echo或 cat . cat产生相同的不良结果:

cat <<EOF >> ~/.bashrc
# Load X display (run 'XLaunch' on Windows with 'Disable access control' checked and 'Native opengl' unchecked!)
# https://sourceforge.net/projects/vcxsrv/
export DISPLAY=$(grep -m 1 nameserver /etc/resolv.conf | awk '{print $2}'):0.0
EOF

Answer 1

问题是使用双引号/刻度与单引号/刻度
尝试颠倒使用 "和 '，因为 "将解释并运行命令，而 ' 不会解释或运行它。
这应该有效:

echo 'export DISPLAY=$(grep -m 1 nameserver script.sh | awk '\''{print $2}'\''):0.0' >> temp.txt

$ cat temp.txt
export DISPLAY=$(grep -m 1 nameserver /etc/resolv.conf | awk '{print $2}'):0.0

引用: https://www.howtogeek.com/howto/29980/whats-the-difference-between-single-and-double-quotes-in-the-bash-shell/
引用带引号的字符串中的转义文本:
https://stackoverflow.com/a/48352047/13064727