Linux

Ifconfig: You will use the Ifconfig command when modifying a network interface that is already in the kernel. This command is commonly used for system tuning and debugging, but it can also be used to set up interfaces during the boot process.

grep extracts the string (in full line output)-a searches the document in text format-C calculates the number of times to find the "searched string"-I ignores case differences-N Output line number-V takes the reverse selection, which shows the line

Text Command Data analysisSuppose there are hundreds of rows of interface access logs that are poured out on the line, and the log is recorded in the following

Yum Package ManagementYum: Software update mechanism based on RPM package constructionAutomatically resolve package dependenciesAll packages are provided by a centralized Yum software repository.[[email protected] desktop]

One, hard disk partition1. Classification of hard disk partitions: Primary partition, extended partition, and logical partition.2. Number of hard disk partitions: a maximum of four primary partitions can be divided on one hard disk.3.fdisk: Create a

The Monitor system Status command top and Freetop commands are able to view the status of the systemLoad average: Average load of 1 minutes, 5 minutes, 15 minutes For example: The company in a minute for a yard for a number of 3 tasks, and 1 minutes

First, the conceptAtomic operations provide instructions for atomic execution, with no interruption in the middle. Just as atoms are thought to be indivisible particles, atomic manipulation (atomic operation) is an inseparable operation.The

The tar command packages multiple files in tar CVF xx.tar the package file name, tar xvf xx.tar-c path, tar cvzf xx.tar.gz in gzip packaged and compressed, tar CVJF xx.tar.bz2 compressed text Name, packaged and compressed in bzip2Common options for

1. Adding traffic statistics for ip/portsNetwork traffic:0.0. 0.0 8087Out-of-network traffic:172.12. 5.25 82832. View traffic statisticsIptables-l-v-n-XExamples of results:Chain INPUT (Policy ACCEPT29059Packets7794993bytes) pkts bytes Target prot

TopThe zombie process loses the child process of the parent process, consumes memory and does not consume CPUCPU utilization: The amount of work that is calculated in the actual unit timeCPU Load: CPU is scheduled to workFreeBuffers represents the

/: root directory, there is only one root directory under Linux./bin,/usr/bin: Directories that can perform binary files/boot Place the Linux kernel file:/boot/vmlinuz system boot:/boot/grub/dev: A device file that stores a Linux system;

1. Start the system and press the E key to enter edit mode when GRUB2 starts the screen display.2. Add the following at the end of the Linux16/linux/linuxefi parameter line:Init=/bin/sh3. Press Ctrl+x to boot to the shell.4. Mount the file system in

The difference between Linux buffer and cache.A buffer is something that have yet to being "written" to disk.A cache is something that have been "read" from the disk and stored for later use.Both are data in RAM. In a nutshell, buffer is about to be

Before we had both LVS and heartbeat tested separately, it was time to merge1.lvs+heartbeat:Show us the console first:Let the two software work together and let the platform have a mechanism to alarm and rescue, we need to install Ldirectord

Basic commandsUseradd XXX Create a userUname Viewing system architecture informationUname-a Show DetailsUname-r displaying kernel informationDate Displays the current network timeCat/etc/redhat-release View Storage Release versionhostname xx Change

Tag: Execution time. SH path timing, sequential plan execution plan Lin nbsp1. View all Scheduled Tasks: command: "Crontab-l" the meaning of the numbers is as follows: From left to right, in order: minutes, hours, days, months, weeks.2, edit the

Root user does not have permission settings if the file has X, you can perform permissions on the directory R: You can view the directory under the file name W: can be created in this directory, delete, modify the file name x: can CD into the

a while ago saw a target for domestic Linux use of the survey table, with a lot of emotion. Now I've heard of Linux, there are a lot of people with basic Linux operations, but there is really little to do with Linux . Whether it is a company or a

Author:drivermonkeyMail:[email protected]phone:13410905075qq:196568501is Linux threads the same as other implementations? No. They is better-while mostly keeping the same API. As stated above, most multithreaded OSs define a thread separately

Body Processing Command, tar command, and body tar command Use the cat command to merge files vertically. The specific command is as follows (Note:> indicates to overwrite the execution result of the command on the left to the right,> to append the