Linux

In Linux, after the scheduled task execution command has the mail alarm function, the next step is to make a scheduled task for periodic execution of this task, in this way, you can receive the alarm information periodically. Before doing a

A glimpse of how to build your Linux "Task Manager"In Windows, you must have used the task manager. In particular, we want to see how much CPU usage, memory is left, or when a program fails to be shut down due to an exception, you will certainly use

Postfix implements simple configuration of mail sending 1 install postfix. Use rpm-qa postfix to check whether postfix is installed. If no, use yum install postfix. 2 Configure/etc/postfix/main. cf [root @ reage ~] # Vim/etc/postfix/main. cf

Keepalived04: run the Custom Script 01 on the MASTER. After the BACKUP switchover, you can run the Custom Script: 02 configuration instance: 03 04! Configuration File for your 06global_defs {07 notification_email {08 oscersong007@gmail.com09} 10

Wdcp configures and processes site access logsWdcp starts from Version 2.2 and supports web Log cutting, saving by day, compressing and packaging, and setting retention and daysSpecific settings are as follows:System settings are shown in figureIn

Linux Account Management, user and group user account commands useradd add new user account usermod Set User Account Information userdel delete user account passwd Change User Account Password chage Change User Account Password life finger show User

Linux uses ssh password-free remote login to another machine. 1. Use the ssh-keygen command under your own machine (master) to create a public key, if you use ssh-keygen-t rsa to create an rsa file, the program will ask you about the directory to

For commands related to viewing networks in ubuntu, refer to querying Nic addresses by IP address (arping IP address) Checking computer name nmblookup-a ip address (ifconfig eth0 | awk '/inet/{split ($2, x ,":"); print x [2]} 'view the IP address

Grub menu. the GRUB boot menu has been removed due to reinstallation of the list configuration. I don't know how to find it. Today I saw the post and tried it. It succeeded, the main step is to restore Grub with the LAN part t below, which is also

Regular Expression matching of nginx forwarding rules, where :*~ Case-sensitive matching *~ * Case-insensitive matching *!~ And !~ * These are case-insensitive and case-insensitive Files And Directories. *-f and! -F is used to determine whether a

When you telnet to a Solaris 10 server when Solaris 10 fails to telnet, the system prompts telnet: Unable to connect to remote host: Connection refused serial port logon to view # svcs-a | grep telnetuninitialized Nov_12 svc: /network/telnet: the

Online disk addition and LVM volume expansion case 1. Add a hard disk and scan it online. First, add a hard disk to the VM. Note that it must be a SCSI hard disk. Scan the hard disk without restarting the operating system. Echo "---">/sys/class/scsi_

Linux Command learning-single quotation marks (''), double quotation marks (" "), and small quotation marks ('') are also very important for the application of quotation marks when writing shell scripts, here we will summarize the characteristics of

Nginx modifies the size of the uploaded file to limit the size of a newly installed server and uses nginx as the proxy. I suddenly found that the client file uploaded for more than 1 MB could not be uploaded normally, so I modified the nginx

Linux basics: the command line text processing tool uses the keyword-based search command grep to search text $ grep 'shuangde'/etc/passwd $ find/-user shuangde | grep Video-I is ignored during search case-n: display the number of rows in the result-

Sysv-rc-conf sets sudo apt-get install sysv-rc-conf to be automatically started when ubuntu is started. It is a powerful service management program, the comments from the masses are that sysv-rc-conf is better than chkconfig. Run: # sudo

Ubuntu is installed to back up files .. The Disk Utility is used to draw 20 GB from the blank space of the mechanical hard Disk, and the volume name is backup, at this time, the system will automatically mount it to/media/backup and then create a

In the Ubuntu environment, the network configuration file for network connection configuration of Ubuntu mainly has the following key points: IP Address Configuration File:/etc/network/interfaces after it is opened, DHCP can be set or static IP can

In linux, the shell variable $ ## $0 $1 $2 describes the meaning of the shell variable $ #, $ @, $0, $1, $2 in linux. Description: $ PID (ProcessID) of Shell itself $! PID of the background Process last run by Shell $? End code of the last command

  RHEL5.4 is installed on VMware Workstation 7 today. After installation, I find that SSH remote connection is unavailable. I carefully check the network connection between the local machine and the virtual machine and find that the communication