Linux查看配置文件中未被注释的有效配置行

grep 命令示例——去掉注释

$ grep -v "^#" /path/to/config/file
$ grep -v "^#" /etc/apache2/apache2.conf

示例输出:

ServerRoot "/etc/apache2"
LockFile /var/lock/apache2/accept.lock
PidFile ${APACHE_PID_FILE}
Timeout
KeepAlive On
MaxKeepAliveRequests
KeepAliveTimeout
<IfModule mpm_prefork_module>
    StartServers
    MinSpareServers
    MaxSpareServers
    MaxClients
    MaxRequestsPerChild
</IfModule>
<IfModule mpm_worker_module>
    StartServers
    MinSpareThreads
    MaxSpareThreads
    ThreadLimit
    ThreadsPerChild
    MaxClients
    MaxRequestsPerChild
</IfModule>
<IfModule mpm_event_module>
    StartServers
    MaxClients
    MinSpareThreads
    MaxSpareThreads
    ThreadLimit
    ThreadsPerChild
    MaxRequestsPerChild
</IfModule>
User ${APACHE_RUN_USER}
Group ${APACHE_RUN_GROUP}
AccessFileName .htaccess
<Files ~ "^\.ht">
    Order allow,deny
    Deny from all
    Satisfy all
</Files>
DefaultType text/plain
HostnameLookups Off
ErrorLog /var/log/apache2/error.log
LogLevel warn
Include /etc/apache2/mods-enabled/*.load
Include /etc/apache2/mods-enabled/*.conf
Include /etc/apache2/httpd.conf
Include /etc/apache2/ports.conf
LogFormat "%v:%p %h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined
LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %O" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent
CustomLog /var/log/apache2/other_vhosts_access.log vhost_combined
Include /etc/apache2/conf.d/
Include /etc/apache2/sites-enabled/

想要跳过其中的空行，可以使用 egrep 命令

egrep -v "^#|^$" /etc/apache2/apache2.conf