Linux

Benefits of yum: 1. Solve the dependency between software when installing software !!! 2. Solve the Problem of attaching a cd; 3. You can install multiple software packages at a time. 1. Mount the optical drive and install the CD or iso in centos5.5.

1 grep (General Regular Expression Parse) Command Format: grep [option] pattern fileoption: n (-- line-number)-display row I (-- ignore-case) -case-insensitive E (-- regexp = PATTERN)-use an extended regular metadatchset or use egrepl (-- files-with-

Install and Configure snmp 1, cd/usr/ports/net-mgmt/net-snmp/2, make clean3, make deinstall4, make installTk-804.028_502.tar.gz doesn't seem to exist in/usr under freebsd /ports/distfiles /. handle the error: Download The tk-804.028_502.tar.gz

I really don't know how to write this article name about trap and expr in shell, so I just wrote such a strange name. It is about trap and expr. Trap and expr are two commands in shell, which should be familiar to everyone, that is, four arithmetic

0. To download the EnterpriseDB product, log on to http://www.enterprisedb.com/and register it. Download the product and then start testing the product's keystore. It can be installed in graphics, text, and graphics by default. The installation

One linux Command every day (43): killall command link: One linux Command every day (1): ls command http://www.bkjia.com/ OS /210210/163049.html#linuxlinuxcommand every day (2): cd command serial (3 ): pwd command Export (4): mkdir command

The temporary port range adjustment for Linux is the local port allocated to the outgoing connection by the TCP/IP stack. In other words, for example, when squid initiates a connection to another server, the kernel assigns a port number to the local

Introduction to AIX environment variables and the use of [plain] environment variables are the variables set in the operating system environment, applicable to user processes throughout the system; environment variables can be set in commands,

In vim, the tab is automatically converted to a space. In vim, the tab is sometimes converted to a space. Use the ret command (replace tab ). [Range] ret [AB]! [New-tabstop] www.2cto.com: for example, convert the tabs from the first row to the end

In most Linux releases of Linux memory Virtual Disks, memory disks use the/dev/shm path by default. The default size of the file system type tmpfs is the actual memory size, this is in line with the actual operation habits. The operation path is the

Brisk VIM (5): copying brisk VIM (4): replication is especially effective when modifying http://www.bkjia.com/ OS /201212/180024.html operations for the same text, in Windows, we are used to choosing the text www.2cto.com with the mouse, while in

1. Add new Lync users to the synchronization cycle between the Lync database and the AD, and change the phone properties of Lync users to the Lync database at a time when performing operations on AD. We can see the synchronization time period

Samba configuration notes: manually compile the source code on the six servers to install samba and configure sharing. Several details are recorded in the process. Note: www.2cto.com 0. if the firewall is enabled, You need to configure access rules.

At the same time, you need to install VNCserver (one Centos and one Asianux) on two linux servers, but you have encountered the same problem. When you start the VNC, you cannot start it yourself. You need to enter vncserver to connect to it, the

Fix Linux Chinese garbled characters Method 1: Modify the/root/. bash_profile file and add export LANG = zh_CN.GB18030 For other users, the file must be modified accordingly. When using this method, putty can display Chinese characters, but the

In linux, the su command for switching user 1 -- su USERNAME is to disable a new environment variable shell after switching the user, that is, the user's shell is still in the pre-switching state, you have the permissions of the user before the

After ubuntu was installed last time, I want to install VMware Tools in ubuntu and open the terminal. I found that my ubuntu computer has a long name, as shown in the following figure, looking Uncomfortable, I decided to change the computer name

Shell string processing Interception;Shell string truncation problem:1. Linux shell intercepts the first eight characters of the character variable by using the following methods:1. expr substr "$ a" 1 82. echo $ a | awk '{print substr (, 1, 8 )}'3.

1. View System Swap space usage[Root @ rac1 dmp] # free-mTotal used free shared buffers cachedMem: 6081 4465 1616 0 33 4199-/+ Buffers/cache: 231 5850Swap: 2000 2000 0  2. Create a swap file in a suitable space[Root @ rac1 backup] #[Root @ rac1

ACL is mainly for users, groups, and default attributes.1. Enable ACL[Root @ lyy ~] # Mount-o remount, acl/home enabled[Root @ lyy ~] # Mount View/Dev/hda2 on/type ext3 (rw)Proc on/proc type proc (rw)Sysfs on/sys type sysfs (rw)Devpts on/dev/pts