Linux

Linux Page cache and buffer cache are two confusing concepts: Page cache and buffer cache. On the Internet, many people are arguing about the differences between the two caches, at the end of the discussion, there has never been a unified and

In linux, how to set swap partition is generally only available in xen VPS, but openvz does not. Swap partitions can increase a certain amount of memory usage, but the most important role of adding swap partitions is to prevent the sudden increase

Shell function-based usage tries to find all the configuration file content in each program directory in a loop function www.2cto.com #. The parameter is the name of the file to be processed and the function to be processed whilefun () # arg1 file $1

Ulipad is installed on Ulipad in Ubuntu 12.04. The developer is limodou. This IDE uses Python + wxPython. I have been using Ulipad in Windows and recently want to study and experiment in Linux (Ubuntu 12.04,There are some differences in the

The Network File System (nfs) is a mechanism for attaching partitions (directories) on remote hosts to www.2cto.com over the Network, with support for the network file system, you can operate on the shared partition (directory) of the remote host on

The shell script automatically configures dual-nic binding configuration dual-nic binding is one of the basic operations of O & M. The first configuration will be very rare, and the tenth configuration will be felt like a roll, 30th configuration

Basic configuration of iptables (I) basic operation www.2cto.com to list existing iptables policies iptables-L insert a policy iptables-I INPUT 3-p tcp -- dport 22-j ACCEPT note: all traffic that uses the TCP protocol and the target port is 22 is

Check tomcat version 1 in linux. Check the version number cat/proc/version-linux. The version number is equivalent to uname-r. Check the Linux version number www.2cto.com 2. If you use rpm to install tomcat: enter the command: rpm-q tomcat3. If you

The shell captures the page information ip168 queries IP addresses in batch through ip168 #! /Bin/bash while read line www.2cto.com do echo $ line ip =$ (echo-en $ line | awk '{print $3}' | awk-F "/" '{print $1 }') echo $ ip add = $ (wget-q

1. Add-x to execute the shell script, and list the process when executing the script! (For beginners like me) sh-x shell (. /shell can also execute shell scripts, but there is no-x parameter) 2. when the number of passed values is greater than the

For the unix Command Line, the conversion character of shell command line is \ www.2cto.com echo $ PATH // get the current value of the system environment variable include a file (class) to: 1.4. # ifndef _ ALARM _ # define _ ALARM _ # endif extract

Confused about modifying the Apache configuration file and taking effect today, the number of Apache connections was modified as follows: [plain] When StartServers 5 MinSpareServers 5 MaxSpareServers 10 ServerLimit 2048 MaxClients 2000

#! /Bin/sh# This script is auto_nagios# Version 1.0.0# Copyright (c) zhaohaihua zhaohha@ufida.com.cnExport install_dir = "/usr/src/pack_nagios"Dir = 'pwd'Tar zxf $ dir/pack_nagios.tar.gz-C/usr/srcLogin_nagios_user = chanjetFetion_id = 1,

Use of shell processing commands in daily work   #! /Bin/bash# Batch package log files LOG =/data/serverlog/shopDIR = 'LS-l | grep Jun | awk' {if ($7 ~ /9/) print $0} '| awk' $8> "17:30" '| awk' $8 For I in $ DIRDoCd $ LOGTar

Shutdown is a command for shutdown. in Linux, parameters must be included. For example, shutdown-h now is a command for immediate shutdown. However, when running such a command on a terminal, Linux does not shut down sometimes, after reading a lot

/Etc/login. defsPASS_MAX_DAYS 99999 # Maximum Password validity period, 99999: PermanentPASS_MIN_DAYS 0 # indicates whether the password can be changed. If the password is set to 0, the password can be changed. If the password is set to not 0, the

Editor's note: For many webmasters, It is very troublesome to resize the Linux system every time. Some IDC technologies will not install Linux systems, or some will charge a certain amount for installing a system once. Therefore, it is important to

The source code is a text file that needs to be compiled by the compiler and converted into an executable file. During the compilation process, the source code is large and sometimes needs to be divided into several parts for compilation into the

  Target specification: You can use host names, IP addresses, and networks. Example: scanme.nmap.org, dream4.org/24, 192.168.0.1; 10.0.0-255.1-254 -IL : obtains the host or network from the specified file. -IR : select a host randomly (0 does not

  Some can also be used under freebsd... # Uname-a # view kernel/operating system/CPU Information # Cat/proc/version # view the kernel # Cat/etc/issue # view the operating system version # Head-n 1/etc/issue # view the operating system version # Cat/