Knowledgebase
How Can We Help?
Articles
iptables port adding
iptables -I INPUT -p tcp -m tcp --dport 22 -j ACCEPT
adding port 22
Bridge setting
TYPE=EthernetONBOOT=yesNM_CONTROLLED=noDEVICE=em1 //Corresponding network...
CentOS 7 display error at startup “Give root password for maintenance”
CentOS 7 display error at startup “Give root password for maintenance”
This...
CentOS7 Disk Partition
https://urclouds.com/2018/09/29/disk-partitions-and-mounting-in-centos-7-and-rhel-7/
CentOS7 view hard disk conditions and other instructions
CentOS7 view hard disk situation
lsblk...
Centos 8 批量增加ip
1, vi addip.sh
2,編輯addip.sh為以下內容，並wq保存
for I in $(seq 131 190)do nmcli con mod ens255f0...
Centos forbid ping and allows ping
Forbid PING this machine: echo 1> /proc/sys/net/ipv4/icmp_echo_ignore_allAllow PING native:...
Centos kernel upgrade + installation of BBR (centos 7.5 test is successful, HP machine is OK, it is recommended to install step by step)
Centos upgrade kernel1. Check the current kernel version$ uname -r3.10.0-514.el7.x86_64
$ Uname...
Centos7 set high CPU performance
Use the following command to view the current frequency of the CPUcat /proc/cpuinfo |grep...
Centos8 restart network card command
How to restart the network service in centos81. Be sure to reload the configuration file before...
Clear existing iptables rules
iptables -F clears the rules of all rule chains in the preset table filteriptables -X clears the...
How to change ssh port at centos7
https://blog.csdn.net/u013821237/article/details/88925575
How to install Network Manager on centos 8 (Command: nmtui)
How to install Network Manager
1. Log in to root first, then enter the command and press...
How to use HP brand raid card
During booting, press "F8"
1: create logical...
How to using SpeedTest to test speed at CentOS
CentOS7 uses SpeedTest tool to test speed
1. Download the SpeedTest script directly and run the...
How to view Linux system information on Centos Test network bandwidth and hard disk read and write speed
View the machine configuration and speed measurement on Centos
1. You can enter the...
NTP time synchronization
LINUX time synchronization problem:
To prevent udp reflection, 123 udp is prohibited.
Centos...
Reset password (crack password)
CentOs8 cracking password solution...
There are no files, but the hard disk is always full
The root partition is full, please expand partition
Two ways to change the name of the network card in centos7
First of all, why do we need to change the name of the network card, because we need to automate...
View the restart time of the linux system
last //command
who -b
uptime
adding port at firewall (centos 7)
2. Edit firewall, to allow port access. Process the following command, from port 80 change to...
centos 7 firewall enable setting
centos7 firewall
Run following command to check firewall status:
sudo systemctl status...
centos adding mutli-IP to system
Enter network card eth0
vi /etc/sysconfig/network-scripts/ifcfg-eth0
Add this command at last...
centos mounting old hard drive
After the new server (or new hard disk) is installed with the linux system, shut it down, and...
centos 安装tcping
1、以root账号登陆，防止系统过于精简，先更新系统软件源：
1 2 3 4
yum update -y # CentOS 系统用这个 apt-get update -y #...
centos卡在starting switch root 自检修复教程
1.重启Linux 在开机界面 按↓键打断启动2.键入 e 编辑可配置项目3.将linux16 /vmlinuz-3.10.0～～～中ro后删掉，修改为 rw...
linux挂載舊盤快速如何快速操作
Linux裝新挂舊后快速處理挂盤的操作：1.fdisk -l //確認硬盤有正確識別
2.lsblk -f //查看舊硬盤分區類型
3.mkdir /data...
如何修改CentOS 7.6的网卡名称
修改grub文件，添加内核参数net.ifnames=0 biosdevname=0信息，使网卡名称修改为eth0...
