linux - Bash 忽略 $

Question

我有一个 bash 脚本，它在后缀 main.cf 文件中回显

IPADD=$(ifconfig  | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1}')
cat << EOG > /etc/postfix/main.cf
# LOCAL PATHNAME INFORMATION
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix

# QUEUE AND PROCESS OWNERSHIP
mail_owner = postfix
# SENDING MAIL
myorigin = $mydomain

# RECEIVING MAIL
mydestination = $myhostname localhost.$mydomain localhost $mydomain
# TRUST AND RELAY CONTROL
mynetworks_style = host
smtp_bind_address = $IPADD
inet_interfaces = $IPADD, 127.0.0.1

EOG

问题是一旦您运行脚本，它就会从以下位置删除“$mydomain”:

 # SENDING MAIL
    myorigin = $mydomain

并且还去掉了“$myhostname”和“$mydomain”

# RECEIVING MAIL
    mydestination = $myhostname localhost.$mydomain localhost $mydomain

我希望 $IPADD 工作并运行，但希望它忽略 $mydomain 和 $myhostname 前面的“$”。

这可能吗？

Answer 1

cat << 'EOG' > /etc/postfix/main.cf
# other stuff
myorigin = $mydomain
# other stuff
EOG

Here Document