1. cron and crontab are missing in docker image of ubuntu 16.04

在鏡像中沒有 cron 命令

1. How to install php-redis extension using the official PHP Docker image approach?

php的docker鏡像中安裝 redis擴展

1. How To Set Up a Basic Iptables Firewall on Centos 6

centos 开启端口

iptables -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
iptables -A INPUT -p tcp -m tcp --dport 443 -j ACCEPT

1. centOS怎样强制卸载PHP以及自定义安装PHP




2. ERROR: cannot verify dev.mysql.com’s certificate

wget on Windows gives 'ERROR: cannot verify x's certificate,'

1. centos6 安装 LAMP

CentOS6.5 下升级 PHP7、MySQL5.7

rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm

rpm -Uvh remi-release-6.9-3.el6.remi.noarch.rpm
warning: remi-release-6.9-3.el6.remi.noarch.rpm: Header V4 DSA/SHA1 Signature, key ID 00f97f56: NOKEY
error: Failed dependencies:
epel-release = 6 is needed by remi-release-6.9-3.el6.remi.noarch


yum install epel-release

root@localhost ~]# yum list php
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again

CentOS6.xでEPELリポジトリ入れたときのエラー対処

yum install php php-cli php-curl php-json php-pdo php-mysql php-gd php-bcmath php-xml php-mbstring php-mcrypt php-redis

[root@localhost ~]# php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
PHP Warning: copy(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed in Command line code on line 1
PHP Warning: copy(): Failed to enable crypto in Command line code on line 1
PHP Warning: copy(https://getcomposer.org/installer): failed to open stream: operation failed in Command line code on line 1

yum install php-crypto

ntp How do I update a CentOS server's time from an authoritative time server?

https://www.pool.ntp.org/zone/hk

[root@localhost backup]# wget http://curl.haxx.se/ca/cacert.pem
--2009-05-19 03:18:33-- http://curl.haxx.se/ca/cacert.pem
Resolving curl.haxx.se... 151.101.194.49, 151.101.2.49, 151.101.66.49, ...
Connecting to curl.haxx.se|151.101.194.49|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://curl.haxx.se/ca/cacert.pem [following]
--2009-05-19 03:18:33-- https://curl.haxx.se/ca/cacert.pem
Connecting to curl.haxx.se|151.101.194.49|:443... connected.
ERROR: cannot verify curl.haxx.se’s certificate, issued by “/C=BE/O=GlobalSign nv-sa/CN=GlobalSign CloudSSL CA - SHA256 - G3”:
Issued certificate not yet valid.
To connect to curl.haxx.se insecurely, use ‘--no-check-certificate’.


certificate not yet valid 可能是服务器中的时间(在服务器的终端输入date命令查看服务器的时间)不对

“Issued certificate not yet valid.” with wget?

lamp 出现

SQLSTATE[HY000] [2002] Permission denied

centos redis server

Install and Configure Redis on CentOS 7

centos6 rabbitmq

CentOS安装新版RabbitMQ解决Erlang 19.3版本依赖

rabbitmq-plugins list
rabbitmq-plugins enable rabbitmq_web_mqtt

rabbit mq plugins

centos 卸载 php

安装了 php7.3RC4,卸载安装回 php7.2~~

How to uninstall an older PHP version from centOS7

yum -y remove php*

然后在重装 php7.2

sudo yum install php php-cli php-curl php-json php-pdo php-mysql php-gd php-bcmath php-xml php-mbstring php-mcrypt php-redis