Linux

1. Switch Machine reboot restart:shutdown [-effhknr][-t seconds] [TIME] [warning message] Shutdown:Shutdown [-effhknr][-t number of seconds] Time [Warning message] Shutdown:-C When executing"shutdown-h 12:50"command, just press +key to interrupt the

Today to add firewall rules to the server, accidentally deleted a rule, and then my remote connection is broken, my boss suddenly asked me iptables configuration file path where, at that time, I really do not know because all are command to add a

There are many ways to improve server performance, such as dividing picture servers, master-slave database servers, and Web server servers. However, with limited hardware resources, the maximum performance of the squeezing server and the ability to

In the daily tedious operation and maintenance work, it is a very important part to carry on the security check of Linux server. Today, share how to check if the Linux system has been compromised?First, whether the intrusion check1) Check System log

First step: Run the command yum install tigervnc-server-ySecond Step: Install TelnetThird step: Run Vncserver, create desktopVncserver-kill:1 Delete the number of the desktop 1Server Test Port 5901Testing under WindowsThe telnet command does not

I. Absolute path and relative path Absolute path For example, the command to modify the NIC configuration fileVi/etc/sysconfig/network-scripts/ifcfg-ens33Over here/etc/sysconfig/network-scripts/ifcfg-ens33is the absolute path, the

1. Terminology of network communication1.1. Three modes of communicationUnicast, multicast, broadcast;1.2. LAN compositionComputers PCs Servers interconnections NICs Media Network devices Hubs Switches routers Protocols Ethernet IP ARP DHCP(1) Hub

Common Partitioning loading methods: mount Mount ISO file : #mkdir/MNT/ISO1 #mount –o Loop Linuxsetup.iso/mnt/iso1 Linux does not require a virtual optical drive, you can directly read the ISO file.

Linux Beginner-ddns Configuration ChapterIf the DNS server is logging multiple hosts ' IPs, and the IP of those hosts is automatically obtained through the DHCPD service, it will be very difficult because the DNS settings do not know the host

CP command: Used to copy one or more source files or directories to a specified destination file or directory. It can copy a single source file into a specific file with a specified file name or a directory that already exists. The CP command also

Linux under the Hosts file 1, host name: both on the LAN or the Internet, each host has an IP address, is to distinguish between this host and the host, that is, the IP address is the host's number. Public network: The IP address is not easy to

Embedded system Update Kernel 1. ObjectiveThere is a friendly arm of the MINI2451 board, this week to try to compile the kernel, and then update the board of the Linux kernel, want to update the Linux Kernel 4.1 version, but for a variety of reasons

Ubuntu configuration Installing OpenSSH ServerInvoke command: sudo apt-get install Openssh-server View serverConfirm Sshserver is started: ps-e | grep sshThe presence of sshd can prove that Ssh-server has been activated. If it does not

L05-Linux deployment msmtp + mutt send mail, msmtpmutt I. Preface First of all, you have to understand the process of sending an email, the following section of the theory Excerpted from the official website of Liao Xuefeng

Batch configure SSH mutual trust script and ssh mutual trust script During large-scale automated deployment, we often need to configure SSH mutual trust on the server so that the automated script can log on to the remote server without password. The

Share common linux commands on centos 7 and centos 7 I. Preface Linux is vast and sea-like, and the linux knowledge required for server deployment is not much. The following is a common command for deploying projects on centOS7 ECs for linux

Commands for interchange of date, time, and Unix timestamps in Linux Command lines At work, you often need to get the current Unix timestamp or convert the given timestamp to a date format that we can recognize, on the linux Command Line terminal,

Linux Command: rmdir command to learn and use, linuxrmdir Today, I want to learn about the command rmdir in linux. Rmdir is a common command used to delete an empty directory. A directory must be empty before it is deleted. (Note that the rm-rdir

Xshell connection to the Virtual Machine Ubuntu, xshell Virtual Machine ubuntu Recently, in order to learn about database operations, we are preparing to build an environment in a virtual machine for operation (why do we build a learning

Linux crontab command usage details and examples, linuxcrontab Linux systems are controlled by the cron (crond) System Service. The Linux system has a lot of planned work, so this system service is started by default. In addition, because users can