netstat -tunlp |grep 80 # 查看端口占用情况
locate libGeoIP.so.1 # 定位so文件路径
df -T -h # 查看文件系统格式
cat /etc/redhat-release # 查看系统版本
free -m # 查看内存占用
# block_size、number_of_block 大小可以自定义,比如 bs=2M count=1024 代表设置 2M * 1024 = 2G 大小 SWAP 分区。
dd if=/dev/zero of=/var/opt/swap bs=block_size count=number_of_block
#启用交换分区文件
mkswap /var/opt/swap
#启用虚拟内存
swapon /var/opt/swap
#如果在 /etc/rc.local 中有 swapoff -a 需要修改为 swapon -a
vim /etc/rc.local
swapon -a
#开机时启用虚拟内存
vim /etc/fstab 添加
/var/opt/swap swap swap defaults 0 0
#配置空闲内存少于 60% 时使用 SWAP 分区:
echo 60 >/proc/sys/vm/swappiness
#永久性修改上面的数据
vim /etc/sysctl.conf
vm.swappiness=60
# ext4 通过df -T -h查询
vim /etc/fstab
/dev/vdb1 /var/opt ext4 defaults 0 0
service network restart
failedMoreMore2network.service - LSB: Bring up/down networking
Loaded: loaded (/etc/rc.d/init.d/network)
Active: failed (Result: exit-code) since Fri 2019-06-12 22:30:46 GMT; 28s ago
Process: 3657 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)
Jun 12 04:08:28 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jun 12 04:08:28 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jun 12 04:08:28 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jun 12 04:08:28 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jun 12 04:08:28 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jun 12 04:08:28 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jun 12 04:08:28 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jun 12 04:08:28 localhost.localdomain systemd[1]: network.service: control process exited, code=exited status=1
Jun 12 04:08:28 localhost.localdomain systemd[1]: Failed to start LSB: Bring up/down networking.
Jun 12 04:08:28 localhost.localdomain systemd[1]: Unit network.service entered failed state.
Solution:
systemctl stop NetworkManager
systemctl disable NetworkManager
systemctl status NetworkManager -l
then setting a static configuration instead of DHCP resolve the issue.
job for network.service failed because the control process exited with error code
chattr -i /home/wwwroot/你的网站目录/.user.ini
rm -rf .user.ini
让 root file system 可以写入
mount -o remount,rw /