Linux

1. The local machine is not connected to the Internet. Set yum to search for vi/etc/yum from the local device. repos. d/Centos-Media.repo 2. mount iso mount/dev/cdrom/mnt/cdrom3.yum install yum-y install samba * -- skip-broken4. modify the

Redhat9 compile and install apache2.2.23 (1) Get apache source code: wget http://archive.apache.org/dist/httpd/httpd-2.2.23.tar.gz (2) unzip: www.2cto.com tar-zxvf httpd-2.2.23.tar.gz (3) Compile and install: cd httpd-2.2.23. /configure -- prefix

In Linux, the application is displayed as a square to solve the java application in Linux (I use ubuntu). If a Chinese character is entered in the UI, it is displayed as a square.There is no problem in output or file generation, but the input in the

The first problem that occurs after the project is deployed to linux is the Exception error generated during tomcat startup: java. io. fileNotFoundException: Mirrors. log (Permission denied) www.2cto.com this error is caused by my log4j. the log

For linux operating systems and time synchronization settings, note the following command prerequisites: run the root permission to set the time: www.2cto.com date-s 11:25:36: date-s 07/26/2005 forcibly write the system time to CMOS (otherwise, the

To solve the problem that users and groups cannot be added in linux (the groupadd command is unavailable), you need to install mysql on a linux server. When installing mysql, an error message is displayed: www.2cto.com [root @ localhost

Extraction of characters and statistics in Linux shell programming 1. Assume that the format of a bb file is as follows: www.2cto.com currently requires to extract the above part of the red body, which can be achieved through the following command:

Linux obtains the process id and name as a shared library, and requires statistics on the Usage Frequency and usage of various applications in this library. In order to make better improvements to the main applications. Www.2cto.com, You need to

Java classpath sets the delimiter between shell script linux bash jar files in batches to ':' www.2cto.com export JAR_HOME = path to directory which limit des jars for f in $ JAR_HOME /*. jar do JAR_CLASSPATH = $ JAR_CLASSPATH: $ f done export

Kernel's interface for setting TCP heartbeat SO_KEEPALIVE www.2cto.com/proc/sys/net/ipv4/tcp_keepalive _ * when TCP link has no data communication for a long time, to prevent silly behaviors (Client crash), you can send some "hello" TCP packets.

1. Disable services not required by some servers For example, bluetooth and pcscd   2. Cancel Some uncommon scheduled tasks For example, makewhatis. cron (in/etc/cron. weekly and/etc/cron. daily) is used to generate the whatis database. In addition,

In linux, if you want to use the source code package for compilation and installation, you need to use the gcc tool. This tool is usually available by default when installing the system. Run rpm-qa | grep gcc to check whether gcc is

The Df command is used to view the file system by disk partition in linux. You can add parameters to view the remaining disk space. The command format is as follows:Df-hlDisplay format:File System capacity used available % mount pointFilesystem Size

I. Introduction to openvpnOpenvpn is an SSL-based vpn. It uses the industrial standard SSL/TLS Protocol to implement the layer-2 and layer-3 secure data link VPN. Its advantages are as follows:1. It is secure Based on the SSL protocol and can be

#! /Bin/bash## This script is used to add or delete users in batches. The initial user password is 123456. You need to change the password for the first login.# Format:./class_stu.sh parameter 1 parameter 2 parameter 3# Parameter 1: Start user name,

Syntax: crontab [-e [UserName] |-l [UserName] |-r [UserName] |-v [UserName] | File]Note: crontab is used to allow users to execute programs at a fixed time or interval. In other words, it is similar to the user's time table. -U user is used to set

To disable SELinux:Modify selinux = "" in the/etc/SELINUX/config file to disabled, and then restart.If you do not want to restart the system, run the setenforce 0 command.Note:Setenforce 1 sets SELinux to enforcing ModeSetenforce 0 sets SELinux to

Modify the Swap partition size after installing the Linux system (two methods) After Linux is installed, what should I do if the swap partition is too small? How can I expand the Swap partition? There are two ways to create a new swap partition, one

Query the number of digits in a Linux SystemWe often encounter situations where we need to query the number of digits in the linux system. The following are two methods that I usually judge for reference only.1. check whether there is a/lib64

I. Introduction to VNC:VNC, fully known as Virtual NetworkComputing, is a desktop sharing system. It is similar to the Remote Desktop function in windows. VNC uses the RFB (RemoteFrameBuffer, remote frame buffer) Protocol to remotely control another