Linux 启动 httpd - 检索 pid 文件时出错（空）
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Starting httpd - Error retrieving pid file (null)
提问by user1316233
I manually compiled and installed httpdon Fedora. I am trying to start it for the first time:
我httpd在 Fedora 上手动编译并安装。我第一次尝试启动它：
./apachectl start -d ../
and receive the following error:
并收到以下错误：
(20014)Internal error: Error retrieving pid file (null)
Remove it before continuing if it is corrupted.
Any help would be appreciated!
任何帮助，将不胜感激！
回答by Andrew Tomazos
A pid file is a file that contains the process id of a daemon (either in the file body or the file name). It is used by a daemon to make sure only one version of it is running at one time. It does this by either checking for the pid files existence or using the flock feature of some os/filesystems to lock it.
pid 文件是一个包含守护进程进程 ID 的文件（在文件体或文件名中）。守护进程使用它来确保一次只运行一个版本。它通过检查 pid 文件是否存在或使用某些操作系统/文件系统的 flock 功能来锁定它来实现这一点。
The error indicates that it could not access the pid file, which would indicate to my a permissions error.
该错误表明它无法访问 pid 文件，这将向我表明权限错误。
回答by Johnny Friend
You need to remove the httpd.pidfile and restart apache or xampp to solve this issue. Following page explains the instructions to remove that file:
您需要删除httpd.pid文件并重新启动apache 或xampp 才能解决此问题。以下页面解释了删除该文件的说明：
回答by Redy S
I face same problem in ubuntu, and I try to run this code. Try to run :
我在 ubuntu 中遇到了同样的问题，我尝试运行此代码。尝试运行：
sudo rm /opt/lampp/httpd.pid
then
然后
sudo /opt/lampp/lampp restart
回答by llioor
If you have (13)Permission denied:so just add "sudo " and then add your commend.
如果您有(13)Permission denied:，只需添加“sudo”，然后添加您的推荐。
回答by Ivan
I had this issue on termux. i did
我在 termux 上遇到过这个问题。我做了
su
find -iname httpd.pin
and then
进而
su
rm /sbin/.magisk/mirror/data/data/com.termux/files/usr/var/run/apache2/httpd.pid
