重啟Linux系統(tǒng)后,配置環(huán)境需要重啟

重啟 Nginx。

重啟命令是:
/usr/local/nginx/sbin/nginx -s reload

端口被占用:
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)

執(zhí)行殺掉進(jìn)程:
killall -9 nginx

啟動(dòng):
/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf

結(jié)束

重啟mysql

[root@VM_0_16_centos ~]# service mysql restart

啟動(dòng)失敗:
ERROR! MySQL server PID file could not be found!

Starting MySQL. ERROR! The server quit without updating PID file (/var/run/mysqld/mysqld.pid).

根據(jù)提示,"/var/run/mysqld/mysqld.pid"該路徑文件的問(wèn)題

強(qiáng)制重啟系統(tǒng)后導(dǎo)致mysqld/mysqld.pid丟失

創(chuàng)建相關(guān)文件
[root@VM_0_16_centos run]# mkdir /var/run/mysqld
[root@VM_0_16_centos run]# vim /var/run/mysqld/mysqld.pid

設(shè)置權(quán)限
[root@VM_0_16_centos run]# chown -R mysql /var/run/mysqld/
[root@VM_0_16_centos run]# chgrp -R mysql /var/run/mysqld/

[root@VM_0_16_centos run]# chown -R mysql.mysql /usr/local/mysql/
[root@VM_0_16_centos run]# chgrp -R mysql /usr/local/mysql/

再次重啟
[root@VM_0_16_centos run]# service mysql restart

ERROR! MySQL server process # is not running!
Starting MySQL. SUCCESS!

重啟php

啟動(dòng)php-fpm:

方式一:
/etc/init.d/php-fpm start
重新啟動(dòng)php-fpm:

方式二:
service php-fpm restart

成功后再 重新啟動(dòng)nginx

(如果失敗
Failed to start php-fpm.service: Unit php-fpm.service not found. 
往下走):
重新啟動(dòng)nginx
service nginx restart

重新啟動(dòng)nginx

如果沒(méi)有配置的上面命令執(zhí)行會(huì)失敗,使用下面安裝路徑啟動(dòng):
/usr/local/nginx/sbin/nginx -s reload

如果已經(jīng)啟動(dòng),報(bào)錯(cuò)的話,需要?dú)⒌暨M(jìn)程再執(zhí)行:
unable to bind listening socket for address '127.0.0.1:9000': Address already in use (98)

查看進(jìn)程():
netstat -nldp |grep 9000

返回信息:
tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 20016/php-fpm: mast

殺掉進(jìn)程():
kill 20016

關(guān)于9000端口被占用的情況:
正常被php-fpm占用可以通過(guò)殺掉進(jìn)程來(lái)解決,
但是如果php-fpm沒(méi)有進(jìn)程:

[root@VM_0_17_centos php]# /etc/init.d/php-fpm start
Starting php-fpm [29-Dec-2018 12:25:57] ERROR: unable to bind listening socket for address '127.0.0.1:9000': 
Address already in use (98)
[29-Dec-2018 12:25:57] ERROR: FPM initialization failed
 failed
[root@VM_0_17_centos php]# killall php-fpm
php-fpm: no process found

也就是端口被占用無(wú)法啟動(dòng),但是又沒(méi)有查詢(xún)到有進(jìn)程的死循環(huán)狀態(tài)(php無(wú)法訪問(wèn),報(bào)錯(cuò)504 timeout , 但是可以訪問(wèn)靜態(tài)頁(yè)面)

本人網(wǎng)上搜索了一下方法,沒(méi)有成功,
最終選擇: 重啟系統(tǒng) !

查看日志中顯示子線程不夠:
WARNING: [pool www] server reached pm.max_children setting (5), consider raising it

默認(rèn)安裝路徑/usr/local/php/etc/php-fpm.d/www.conf里
設(shè)置pm.max_children = 300