#查看swap比率 cat /proc/sys/vm/swappiness # open /etc/sysctl.conf as root. Then, change or add this line to the file vm.swappiness = 10 # Reboot for the change to take effect. # You can also change the value while your system is still running with sysctl vm.swappiness=10 # You can also clear your swap by running swapoff -a and then swapon -a as root instead of rebooting to achieve the same effect. swapoff -a swapon -a
.ssh文件夹下建立config文件：
# 84 Host 172.28.10.84 HostName 172.28.10.84 PreferredAuthentications publickey IdentityFile ~/.ssh/id_rsa_84 执行ssh-agent让ssh识别新的私钥
ssh-add ~/.ssh/id_rsa_84 该命令如果报错：Could not open a connection to your authentication agent.无法连接到ssh agent，可执行ssh-agent bash命令后再执行ssh-add命令
pip install virtualenv virtualenv py3env #可选择使用哪个python source bin/activate deactivate
export LANG=zh_CN.UTF-8
export LANGUAGE=zh_CN.UTF-8
make之前需要检查openssl-devel
l Oracle表空间、段、区和块简述
1. set fileencoding 查看文件编码 2. set fileencdding=utf-8 设置文件编码 按wq保存 3. :e ++enc=cp936 # vim打开文档后，encoding=utf-8（locale决定的），fileencoding=latin1（自动编码判断机制不准导致的），termencoding=空（默认无需转换term编码），显示文件为乱码
rpm -ivh mysql-community-common-5.7.22-1.el7.x86_64.rpm mysql-community-libs-5.7.22-1.el7.x86_64.rpm rpm -ivh mysql-community-client-5.7.22-1.el7.x86_64.rpm mysql-community-server-5.7.22-1.el7.x86_64.rpm mysqld --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data/ --initialize service mysqld start grep 'temporary password' /var/log/mysqld.log mysql -uroot -p ALTER USER 'root'@'localhost' IDENTIFIED BY 'cffEx2016!'; GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'cffEx2016!' WITH GRANT OPTION; 拷贝my.cnf到/etc/目录下 my.cnf 权限为-rw-r--r-- 重启mysql