Linux

In Linux to view the memory method we generally use the free command: [root @ scs-2 tmp] # free total used free shared buffers cachedMem: 3266180 3250004 16176 0 110652 2668236-/+ buffers/cache: 471116 2795064 Swap: 2048276 80160 1968116

In linux, the basic commands for starting, stopping, and restarting apache are as follows: This document assumes that your apahce installation directory is/usr/local/apache2. These methods are suitable for www.2cto.com apahce startup commands in any

ESXI4.1 adjust the disk size for linux virtual machines first, adjust the disk size to 60 GB www.2cto.com. Note: if you cannot adjust the disk size for a snapshot of a virtual machine, you must delete the snapshot before adjusting the disk

A little Linux every day-you often need to install the APK program to your mobile phone during the development of the right-click menu. This requires opening the command line and hitting the installation command, which is inconvenient. Www.2cto.com

Sugon A420r-G installation centos5.5 I, Environment server: sugon sky wide A420r-G Operating System: centos 5.5 x86-64 Server comes with three GB hard disk, and through RAID card set as RAID 5 disk array, however, during the system installation

Using rsync to synchronize Linux VPS data rsync is a data image backup tool in unix-like systems. It can be seen from the software name-remote sync. Its features are as follows: www.2cto.com can mirror and save the entire directory tree and file

The "-" Operation in Linux with "-" in the Linux File name has special meanings. For example, adding "-" after the command indicates that "-" is followed by an option. However, there are three methods to create a file with the name "-". For example,

Uninstall jdk in linux. A simple problem occurred all afternoon. Due to the re-Modification of jdk version 1.5 -- 1.6, it was blocked during the uninstallation, www.2cto.com rpm-qa | grep jdk --> jdk-1.6.0_22-fcsrpm-qa | grep java -->

[Linux] bc | determine whether the command is successfully executed bc: www.2cto.com no = 1321456 echo "obase = 2; $ no" | bc binary, octal, same as hexadecimal, the quotation mark content can be replaced to realize the +-* % operation to determine

After reading "write the operating system by yourself", try to build the Linux environment and read "write the operating system by yourself" and then try again. Because I don't want to use windows as the development platform, I have built a Linux

In linux, how does one obtain file or folder permissions? Www.2cto.com ls-ld/home/| awk '{print $1}' | sed's/^ [a-zA-Z-] // 'rwxr-xr-x [root @ localhost array_study] # echo "obase = 8; ibase = 2; 'LS-ld/home/| awk' {print $1} '| sed's/^ [a-zA-Z-] //'

The Linux mount command is often used to mount files outside the Linux system. This command is most commonly used to mount cdrom, so that we can access the data in the cdrom, Because you insert the CD into the cdrom, Linux does not automatically

Laruence's linux Command Learning -- declare [root @ www ~] # Declare [-aixr] variable www.2cto.com option and parameter:-a: Define the variable named variable as the array type-I: the variable named variable is defined as an integer (integer)

Installation of Mrtg in linux (CentOS) solution 1. In the early stage, MRTG (1) must be based on the SNMP service. Therefore, make sure that your system has enabled this service, modify the SNMP configuration: # vi/etc/snmp/snmpd. conf removes the

The Ubuntu wired network cannot be connected. The computer is in use. I don't know when the network is disconnected. The Network icon is changed to wireless. If I click the wired connection, the display is still wireless, and the connection is

Useradd user add userPasswd user: Add password for userLl view wenjianLl-d/home to view the current fileLl-a/home/user view implicit files (such as user variable files and launch scripts)Ll-l/View/directorySu-switch to

Postgresql automatic backup generates one file every day and automatically compresses it: 1. Write a shell script and save it as/home/db/dump. sh.Pg_dump db | gzip>/home/db $You can set $ (date + % Y % m % d) on your own. You need to set the

UbuntuNew User Experience 1. Add a user(1) Create a New User username# Sudo useradd username(2) set the username Password.# Sudo passwd username2. Add a user groupCreate a new group groupname# Sudo groupadd groupname3. Modify an account(1) Add

    Sudo su   Enter the Administrator mode, because sometimes the system prompts incorrect passwords when using su. Find./-name "Makefile"   Search for the file path listing the current directory named "Makefile" Grep-nr "test "./  

  1. the user information is stored in/etc/passwd, the password is stored in/etc/shadow, and the group name is stored in/etc/group.   2. 7 columns indicating file/directory permissions: Column 1: d: Directory -: File L: linkfile (connection