Centos 7U Disk Installation

1.

8G u disk

Old Peaches Software

CentOS 7 Everything.iso 7.4G approx.

2. Problems encountered

Install an initial error

Unexpected exception attribute error has no attribute type

A data conflict has been caused by a hard disk system

Format hard Drive resolution

3.SSH Login Slow

Http://www.jb51.net/LINUXjishu/277534.html

SSH login will get stuck for a few seconds

Vi/etc/ssh/sshd_config

Modifying a configuration file

Usedns No

4. Different

Use MySQL branch mariadb instead of Mysql-server in CentOS 7

5. Fast connection releases a large number of time_wait

Http://www.heminjie.com/wordpress/3322.html

PHP MySQL is often not connected and causes a lot of time_wait

Edit/etc/sysctl.conf File

# vi/etc/sysctl.conf

At the bottom of the add

Net.ipv4.tcp_tw_reuse = 1net.ipv4.tcp_tw_recycle = 1net.ipv4.tcp_fin_timeout = 30net.ipv4.tcp_syn_retries = 5net.ipv4.tcp_synack_retries = 5net.ipv4.tcp_keepalive_time = 1200net.ipv4.tcp_max_tw_buckets = 10

Apply the configuration you just added:

/sbin/sysctl-p

Centos 7U Disk Installation