网络配置a、添加网卡b、网卡配置vim/etc/sysconfig/network-scripts/ifcfg-eth0c、确认网络是否畅通、系统优化hosts文件优化配置1、备份原hosts文件\cp/etc/hosts{,.bak}2.数据重定向到file_hostname和IP地址映射cat>/etc/hosts<>/etc/sudoerstail-1/etc/sudoersvisudo-c字符集优化localectlset-localeLANG="en_US.UTF-8"时间同步yuminstall-yntpdateecho'#lidao时间同步at2017-03-08'>>/var/spool/cron/rootecho'*/5****/usr/sbin/ntpdatepool.ntp.org>/dev/null2>&1'>>/var/spool/cron/rootcrontab-l#查看定时任务命令行安全优化（可选）echo'exportTMOUT=300'>>/etc/profileecho'exportHISTSIZE=5'>>/etc/profileecho'exportHISTFILESIZE=5'>>/etc/profiletail-3/etc/配置文件。/etc/profileenlargefiledescriptor一个进程对应一个文件crond定时任务-----systemctlstartcrond/var/spool/cron/root---打开配置文件/var/log/cron----打开日志文件ulimit-a#查看系统支持的最大打开文件数isof-i:22#统计进程打开文件数yuminstall-yisofecho'*-nofile65535'>;>/etc/security/limits.confsource/etc/security/limits.conftail-1/etc/security/limits.conf内核优化猫>>/etc/sysctl.conf<
