Linux

background : Recently the development department needs a proxy server to simulate the customer site environment. Well, then choose Socks5.Environment : Centos6.6 X64Socks Introduction:What is Socks: the firewall Security session Translation protocol

I. OSI seven-layer modelSecond, the TCP/IP modelThree-time handshake principleThird, the default port for common servicesIv. IP Address, subnetting basicsCommunication principle: The interaction of general data is generated in the application layer (

The processor architecture of the Arch Display machine (1)UNAME-M Display the processor architecture of the machine (2)Uname-r displaying the kernel version in useDMIDECODE-Q Display hardware system components-(SMBIOS/DMI)Hdparm-i/DEV/HDA lists the

Reprint please the head source link and the tail two-dimensional code reproduced together, this article from: http://blog.csdn.net/hejjunlin/article/details/52402759Today, the introduction of FFmpeg under Linux installation of the compilation

Linux Introduction to Disk Management (6) Disk Quotas when storing data to disk in Linux, if more than one user is working on the same disk, and one of the files with large data causes the hard disk to run out of capacity, then other users will no

The performance of hardware devices in Linux systemsDevice filesI/O ports:i/o device AddressAll documents:Open (), read (), write (), close ()Device Type:Block devices: block, Access unit "blocks", diskCharacter device: Char, Access unit "character",

Method One: Cut command#ifconfig eth0|grep ' inet addr ' |cut-d ":-f2|cut-d" "-f1192.168.1.11Method Two: awk command1. Use the awk command two times#ifconfig eth0 |grep ' inet addr ' |awk-f ': ' {print $} ' |awk ' {print $} ' 192.168.1.112. Use the

"Linux Capability" For the purpose of performing permission checks, traditional UNIX implementations distinguish, categories of processes: Privileged processes (whose effective user ID is 0, referred to as superuser or root), and unprivileged

Reference http://www.cnblogs.com/yangxia-test/archive/2012/11/27/2790771.htmlHttp://www.cnblogs.com/candle806/archive/2011/01/18/1938286.htmlIn general, Linux installs the RSTATD service, allowing LoadRunner to access the real-time data of its

1, the Replication/etc/skel directory is/home/tuser1, requires/home/tuser1 and its internal files belong to the group and other users do not have any access rights.For:[Email protected] ~]# cp-a/etc/skel//home/tuser1[Email protected] ~]# chmod

The merge log file can use Bash's sort command:#sort " " 4 -o log_all access*.logYou can also use the logresolvemerge.pl provided by Awstats#perl /usr/local/awstats/tools/logresolvemerge.pl-dnslookup= -showsteps access*.log >log_ All-showsteps

Chown is generally used to change the owner. That is, the file belongs to the user.chmod functions are stronger than chown. You can change all properties and permissions for a file. Only the Administrator account has permission to use this

Ulimit settingsUlimit-n to be adjusted to 100000 or larger. The command line executes ulimit-n 100000 to be modified. If you cannot modify it, you need to set/etc/security/limits.conf, join* Soft Nofile 262140* Hard Nofile 262140Root Soft Nofile 2621

Squid reverse proxy, be sure to know what the backend real server's source IP is to configureVim/etc/squid/squid.conf# Squid normally listens to port 3128Http_port Accel Vhost VportCache_peer 119.75.218.70 Parent 0 originserver

. tarUnpacking: Tar xvf Filename.tarPackage: Tar cvf filename.tar DirName(Note: Tar is packaged, not compressed!) ）———————————————. gzDecompression 1:gunzip filename.gzDecompression 2:gzip-d filename.gzCompression: gzip FileName. tar.gz and.

Rights Management Command: chmodCommand name: chmodCommand English Original: Change the permissions mode of a fileCommand path:/bin/chmodExecute Permissions: All UsersSyntax: chmod [{ugoa}{+-=}{rwx}] [file or directory][mode=421] [File or directory]-

I've written several articles about how to use the command line interface to manage files on your system, and here are a few basic commands that are common to all distributions.To copy a file or directory to a new location: CP Path_of_file_1

This article takes CentOS as an example, other Linux please refer to the corresponding method.1. Server-side Install gitYum Install git2. Add a user with no shell logon rights to the server and replace username with the user you want to addUseradd-s/

Head/tail implementation and headtail implementationOnly the basic head/tail functions are implemented. By default, 10 rows and-n parameters are displayed. 1. Use a system call with buffer. System calls such as write/read are not buffered. You can

Linux Security Basics: shell and some basic commands, linuxshell 1. What is shell?Shell is the interface between the user and the Linux operating system.There are multiple shells in Linux, where Bash is used by default. 2. shell Classification(1)