Linux

Ubuntu kernel version management 1. view ubuntu version: Method 1: cat/etc/issue returned result: Ubuntu 6.06.2 LTS \ n \ l www.2cto.com Method 2: sudo lsb_release-a returned result: No LSB modules are available. distributor ID: UbuntuDescription:

/Etc/login. both defs/etc/default/useradd are user password configuration files/etc/motd etc/issue logon information: // etc/passwod user information file/etc/shadow User Password File extremely Logon Restrictions Add "*" in front of the password

Pipeline and redirection 1 in linux: the idea of pipeline linux is to collect many small programs, each of which has special expertise. The load task is not completed by large software, but by Shell mechanism, combined with many small programs. The

The Advanced Policy Firewall (Advanced Policy Firewall) is a software Firewall in the linux environment produced by Rf-x Networks. It is adopted by most Linux server administrators and uses iptables rules, easy to understand and use. Www.2cto.com is

Force modify the root password of mysql to check the ftp configuration file sh/www/wdlinux/tools/mysql_root_chg.sh when you forget the mysql password, sh/www/wdlinux/tools/pureftp_conf_check.sh wdcp permission check is available when FTP cannot be

Linux creates a scheduled task for the current user. type crontab-e to edit the crontab service file www.2cto.com. For example, the file content is as follows: */2 *****/bin/sh/home/admin/jiaoben/buy/deleteFile. sh save the file and exit */2 ***/bin/

Used between linux and linux or between linux and unixMount the shared folder of the nfs server to the client and use the RPC protocol (Remote Process Scheduling)Www.2cto.comNFS rpc1. When the nfs and rpc services on the server are started, many

Check the NIC working mode and speed of the linux system. Sometimes, we need to check the NIC working mode and speed of the linux system. The commonly used commands are mii-tool and ethtool, let's take a look at the following. View eth0 Nic

Brisk VIM (4): modifying brisk VIM (3): removing http://www.bkjia.com/ OS /201212/178266.html I think every Coder has a deep understanding, modifying this operation is so important in the world of code that www.2cto.com is not so much about

In the debug mode of zfs on linux, I tried to enable the switch of zfs on linux, but I still couldn't open it. After repeated attempts, I sent an email to the author of zfs on linux, to obtain the debug method. The following is an example: install

Due to misoperations, the svn server submits the incorrect code to svn, and wants to cancel the submission on the server,After trying, you can delete this submission by performing the following steps: 1. first, find the version number generated

Linux automatically uploads a backup file and uses sftp to automatically back up important data to the target server. 1. Prepare www.2cto.com to install lftp yum install lsfp. 2. Create the execution file bak. sh #!

  1. The system loads the bios and loads coms through the bios. The hardware information of the host is obtained from the settings in the coms, And the bios performs self-check. 2. the bios reads MBR through the INT 13 middle-end function of the

1. Run the following command to view the kernel version:1) [root @ q1test01 ~] # Cat/proc/versionLinux version 2.6.9-22. ELsmp (bhcompile@crowe.devel.redhat.com) (gcc version 3.4.4 200507213.4.4-2) #1 SMP Mon Sep 19 18:00:54 EDT 20052) [root @

An error occurs when a large number of threads (2026 threads) are started using jrockit today: Java codeError starting thread: Resource temporarily unavailable After in-depth queries, problems such as memory and handle count are eliminated, and it

Use the following method to set the socket to non-blocking mode:Int flags = fcntl (socket, F_GETFL, 0 );Fcntl (socket, F_SETFL, flags | O_NONBLOCK );Use the following method to set the socket to non-blocking mode:Int flags = fcntl (socket, F_GETFL, 0

Common commands for Aix: Sorting of memory and CPU consumption processes (1) display 10 processes that consume the most cpu# Ps aux | head-1; ps aux | sort-rn + 2 | head-10 (2) display 10 processes that consume the most memory # Ps vx | head-1;

Apache2 in linuxWorking Principle and configuration of preforkIf "-- with-mpm" is not used to explicitly specify an MPM, prefork is the default MPM on Unix platforms. It adopts the pre-school child process mode, which is also used in Apache 1.3.

You can change the root password in suse linux single-user mode as follows: 1. Select Failsave when starting grub, and delete all the following "boot option" content, write init =/bin/bash, and enter single-user mode. 2. Wait until the command

User Management in LinuxLinux has three types of usersA. Super User: root has all permissions for the operating system. UID is 0.B. Common users: Non-administrator users with limited permissions. UID: 500-6000C. Pseudo-user: facilitates system