Linux

Everyone knows that every file in the Linux file system has three timestamps:Access time (atime--access time): Is the date the file was last accessed.Change Time (Ctime--change): Is the time of the file's inode change (what is the inode?). When you

Date to see the system timefolder DirectoryLs -LView file Time"The prompt should be the file time issue, since the newly created time is later than the current file time, System time problem"Solution:hwclock--set--date= "month/day/year hour: minutes:

Recover disk mistakenly deleted data using Extundelete toolPrinciple:A brief introduction to the knowledge of the inode. Under Linux, you can use the "Ls-id" command to view the Inode value of a file or directory, such as viewing the Inode value of

The main function of the SEMOP function is to perform p/v operation on the semaphore.P operation is responsible for converting the current process from a running state to a blocking state until another process wakes it up. The operation is: apply

In Linux , everything is files, ordinary files are files, directories are files, hardware devices are files, so learning to understand The files in Linux is very important. 　　Linux There are three types of files in:(1) ordinary documents: also

Original address: http://blog.csdn.net/sea_shore/article/details/61024371.rename Command Batch modified file name, in fact, Linux can use other methods to batch change the file name, but rename is too convenientFor example, change all the tables to

A syslog server can be used as a log monitoring center in a network, and all the facilities that can send logs over the network (including Linux or Windows servers, routers, switches, and other hosts) can send logs to it. By setting up a syslog

In Linux, you often use CTRL and other key combinations, which are commonly used and what is the meaning of it? CTRL + C ends a running program Ctrl+d end input or exit shell Ctrl+s Pause Screen Output "Lock

Unix/linux shared memory applications and traps (2012-06-12-14:32)Tags: Linux memory classification: Linux applicationsShared memory is a piece of memory that is reserved for the system to be considered for communication between multiple processes.

as a network administrator, you need to hold user information for administration for each network device that you need to manage. However, network devices usually only support limited user management functions. Learn how to use an external RADIUS

User and user groups Linux is a multi-user, multi-tasking operating system, in order for each user to have more confidential file data, so not see the rights management is more important. Linux file ownership and access authorization are

Operating Environment: CentOS 5.3 + Windows XP SP3 32bit + RealVNC 4.1.2 i386 + TigerVNC.Reference: Xiaoxiang Hermit-linux System VNC Configuration Practice Summary, Sami's blog-VNC configuration, lone leaf wind chimes -linux open vncserver, Remote

1 UDP Receive principleThe UDP receiving process of the operating system is as follows: After receiving a UDP packet, after verifying that there is no error, put in a package queue, each element in the queue is a complete UDP packet. When the

Set up an IPSec VPN for Strongswan in CentOS 6.3 I. Software Description IPsec is a type of Virtual Private Network (VPN) used to establish an encrypted tunnel between the server and the client and transmit sensitive data. It consists of two phases:

Use the GnuPG encrypted signature to verify the reliability and integrity of the downloaded file After you download a file from the Internet (such as the installer, ISO image, or a compressed package), the file may be damaged under different

PDF operation and conversion in Linux If PDF is electronic paper, pdftk is electronic dingtalk, punching machine, adhesive, decryption ring and X-ray lens. Pdftk is a simple tool that can perform various daily operations on PDF documents. Pdftk

Install and uninstall mysql and yummysql in yum in linux 1. Check whether the installation is successful: Yum list installed mysql * Rpm-qa | grep mysql * 2. Check whether the installation package is available: Yum list mysql *   3. Install the

Use Raspberry Pi to build your own web server (I) install LAMP and raspberry lamp1. Adjust pi GPU memoryOccupiedSize As a web server, you do not need to output video signals. Therefore, reduce GPU memory usage to maximize pi performance. 1 sudo

Install and build an FTP server on Ubuntu 14.04 Today, I want to create a network log migration program. If I want to migrate files, I 'd like to use FTP. FTP is used to transmit files from one host to another over the TCP network. This article

Install Odoo8.0 with git source code on Ubuntu Server 14.04 LTS In September 19, 2014, Odoo officially released the official version of Odoo8.0, which is a brand new version that integrates various functions such as website construction. In the