Linux

The purpose of this article is to decide which directory space occupies the most files when disk space is full, so as to analyze the reasons for the lack of space 1, to Xshell or other terminal software through SSH or Telnet login to see the system

1, prohibit the root user login ssh The code is as follows: #vi/etc/ssh/sshd_config Put The code is as follows: Permitrootlogin Yes To The code is as follows: Permitrootlogin No Restart the sshd service The code is as follows: #service

Today, a Web site for login server found no session after login. According to past experience, generally the space is full cause session file generation failed. The code is as follows: Df-h The code is as follows: FileSystem Size Used Avail use%

Rev Rev Displays the last character displayed to the first character. Cases: The code is as follows: [Root@localhost www]# Cat Test 1234 Abcd [Root@localhost www]# Rev Test 4321 Dcba [Root@localhost www]# TAC Test Abcd 1234 Tac Usage:

When you just touch the Linux system VPS host, the operator will often give you a Linux system Remote Login admin username and password. And this password is the default cut has a certain regularity, so it is very unsafe. This time we need to modify

Last month, a user posted a question in the Arch Linux forum and asked why his notebook was completely out of order after running a simple "rm-rf-no-preserve-root/" command. Students with Linux basics should know that running this command is really

The following is the method of Baidu, fsck cautious use, in addition fuser can solve Umount encounter device busy situation Mount;d f-h Vi/etc/fstab is a number of commands that are often used when you encounter read-only and file systems But the

1 first confirm that the directory to be restricted is a separate file system Df-h/home Test 2 If it is a separate file system. You need to add quota support to the directory. A: Temporary program, computer restart failure: Mount-o

In the Windows system, we like to keep the various documents we have prepared in the "My Documents", in the Windows and Linux dual-system machine, we often use Linux in the "My Documents" in the document, We also hope that documents edited in Linux

Detecting new hardware with hardware detection program Kuduz: Service kudzu start (or restart) Viewing CPU information: Cat/proc/cpuinfo View board Information: CAT/PROC/PCI Viewing PCI information: LSPCI (more intuitive than CAT/PROC/PCI)

In Linux to split large files, such as a 5GB log file, you need to divide it into small files, after segmentation to facilitate the normal text editor read. Sometimes, you need to transfer 20GB of large files to another server, and you need to

If your Linux server is exposed to unauthorized users (such as servers in the public room, public office), then its security will have serious problems.  use Single-user mode to enter the system linux boot: When prompted, use a special command

This article summarizes the following commands: Wc:word Count -L: Shows only the number of rows -W: Show Only words -c: Show byte size only Cut: (remove sections from every line of files) deletes a fixed portion of each row of the file, used to

TFTP server-Installation Install Tftp-server with RPM package 1, if the use of the following command to see the service is started, do not install [Arm@localhost]# netstat-a | grep tftp Installed results: UDP 0 0 *:tftp *:* 2, if not installed,

Use the Chkconfig command to view services (or programs) that start automatically at different startup levels, with the following command format: Chkconfig--list The output may be as follows: OpenVPN 0: Close 1: Open ... 6: Close (0-6 is the

This article describes how to manually configure a wireless network card in the Linux command-line interface. Most popular distributions today support the easy configuration of graphical interface Network-manager without using the original methods

first, starting from the foundation Some friends often ask questions in Linux forums, but most of them are very basic. For example: Why do I use a command when the system tells me that I can not find the directory, how can I limit the user's

　　Order to enter VI VI FileName: Open or create a new file and place the cursor at the beginning of the first line VI +n FileName: Open the file and place the cursor at the beginning of nth VI + FileName: Open the file and place the cursor at the

The free command provides a more concise view of system memory usage relative to top: $ free Total used free shared buffers Cached mem:255268 238332 16936 0 85540 126384 -/+ buffers/cache:26408 228860 swap:265000 0 265000 Mem: represents

Apt-cache Search Package Package Apt-cache Show package get information about the package, such as description, size, version, etc. sudo apt-get install package installation package sudo apt-get Install package--Reinstall reinstall package sudo