117笔记问答?CentOS???VirtualBox????,???????????????:
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????????????????????????????????:
sudo yum update -y
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?? /etc/sysctl.conf ??,??????????????:
net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_tw_recycle = 1 net.ipv4.tcp_fin_timeout = 30 net.ipv4.tcp_keepalive_time = 1200 net.ipv4.ip_local_port_range = "1024 65535" net.ipv4.tcp_max_syn_backlog = 8192 net.core.somaxconn = 1024 net.core.netdev_max_backlog = 2000 net.ipv4.tcp_max_orphans = 32768 net.ipv4.tcp_syncookies = 1
?????????????:
sudo sysctl -p
?????EPEL??
EPEL(Extra Packages for Enterprise Linux)?????????????,?????????????????????EPEL??:
sudo yum install epel-release -y
?????NTP??
Network Time Protocol (NTP) ????????,????????????????????????NTP??:
sudo yum install ntp -y sudo systemctl enable ntpd sudo systemctl start ntpd
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?????????????????:
systemctl list -unit-files --types service
????????????,??:
sudo systemctl disable service_name
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?? /etc/fstab ??,??????? noatime ? nodiratime ??,?????I/O??:
/dev/sda1 / ext4 defaults,noatime,nodiratime 0 0
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sudo mount -a
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?? /etc/sysctl.conf ??,????????????????:
vm.swappiness = 10 vm.dirty_background_ratio = 5 vm.dirty_ratio = 10
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sudo sysctl -p
??VirtualBox????
?????????????????????,???????????????????VirtualBox?????
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?????????????(?NAT????),??????????
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????????????????CPU?????????????,????????????