Linux

In the previous article, we talked about the basic composition, basic concepts, and basic principles of the disk.So today's article, let's look at how these devices are represented in the Linux system,such as how different types of hard disks are

Badblocks: Check for damaged chunks in the disk device-B: Specify the chunk size of the disk, in bytes-c: Check several chunks at a time-I: The file is always read by the known corrupted chunks, and the check ignores these chunks-o: The result of

Types of variables for LinuxAccording to the lifetime of the variables, the Linux variables can be divided into two categories:1 Permanent: The configuration file needs to be modified, and the variable will take effect permanently.2 Temporary: With

DF View Disk partition usageUsage: DF [options] ... [File] ...Show information about the file system in which each file resides,or all file systems by default.The required parameters are available for both long and long options.-A,--all include

The front says "disk" is located in the entire computer architecture, whereAnd also learned the "hard disk" and "Bus" Connection interface,are divided into many types, specifically "serial" and "parallel" two categories.In general, serial speed is

1. See if Python is already installedCentOS 7.2 installs python2.7.5 by default because some commands use it, like Yum, which uses python2.7.5.Use the PYTHON-V command to see if Python is installedThen use the command which Python to see the

View Nginx version in centos How to view the Nginx version information, linux is indeed a bit confusing for users who are used to windows, but after getting used to it, you will surely fall in love with it. If you don't talk much about it, simply

At command in CentOSAt command: Schedule a task to execute a job at a specific time.Format: at + timeAt time // The scheduled task Start TimeAt> date>/root/jintian.txt // date: Execute the date command when the system plans to start the

How to view soft and hard raid information in CentOSSoftware raid: You can only view cat/proc/mdstat on the Linux system to view raid level, status, and other information. Hardware raid: the best solution is to use the installed raid vendor's

Linux record-process-related learning View process commands Ps -Aux commonly used combination commands, and Shall | grep queries related process information -L only view processes related to you In details, STAT indicates the status of the

Install epel source in centos EPEL is a software source of yum. It contains software that is not available in many basic sources. After EPEL is installed, the yum software source is extended. Environment: centos6.5 Installation steps: Install

Modify the NIC name in CentOS7 The traditional naming methods for Nic devices in Linux are eth0, eth1, and eth2. CentOS7 provides different naming rules, which are allocated by default based on the firmware, topology, and location information. The

Search for a string in all files in linuxCheck whether all files in the directory contain a certain stringFind. | xargs grep-ri "IBM"Check whether all files in the directory contain a certain string and print only the file name. Find. | xargs

Linux commands recorded by new users 1, pwd: locate the current folder 2. cd: Convert to file 3. mv: Move a file 4 cp; copy files 5 vim: create a file 6 vim. Create a hidden file 7 cd .. back to the upper-level directory 8. Create a

Use of the crontab command for CentOS scheduled tasksIntroduction Crond is a daemon in linux that is used to periodically execute a task or wait for processing some events. It is similar to a scheduled task in windows. After the operating system is

Memory unit conversion in CentOS1. memory unit conversion Meaning of Byte bytes B is the basic unit of computer storage (in bytes );1 English character is 1 byte, that is, 1B;1 Chinese character is 2 characters, that is,

CentOS command -- route 1. Command Format: route [-f] [-p] [Command [Destination] [mask Netmask] [Gateway] [metric Metric]] [if Interface]] 2. command functions: The Route command is used to operate the kernel-Based ip Route table. It is mainly

CentOS deletes Multiple folders under a folder. Delete Multiple folders under a folder in linux Run the rm command to delete Linux Files. \ rm is not displayed for deletion.1. if you delete multiple files and folders in the current directory You

Centos7 adds root permissions to users 1. useradd sha Passwd sha User Creation and password 2. 1. Grant sha root permissions to gpasswd-a sha wheel Ii. vi/etc/sudoers Allow root to run any commands anywhereRoot ALL = (ALL) ALL # original rowSha

Private_data, fileprivate_data in file This is a core data structure between the VFS File System Framework and the underlying implementations of different file/file systems in Linux. Although it is only a pointer, a pointer can solve all problems,