Linux

Noatime and nodiratime settings I believe that anyone interested in the performance and optimization keywords knows that setting noatime when mounting a file system under Linux can significantly improve the performance of the file system. By default,

After analyzing the usage of align, I decided to carefully analyze the u-boot code, but it was ". balignl 16 0xdeadbeef "is difficult, but fortunately, google has found the article" analyze the usage of align ", which is well written by the author.

Use xinetd knowledge in ubuntu [knowledge point] standard http Response file Content HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Content-Length: 0 Date: Wed, 27 Feb 2013 02:34:36 GMT www.2cto.com ubuntu installation (system-level tool, generally not

Centos + heartbeat + mysql configuration 1: install two linux (rh4.5-32-bit) systems and disable the firewall. selinux is set to disable, and two NICs are required for each computer. The IP addresses of node1 and node2 www.2cto.com node1 on the two

I really don't know what to do on the first day of Linux's 1st day, because all kinds of work are carried out in windows, and I don't want to restart the machine, so I don't want to install dual systems, I used the vmwarevm, and installed Ubuntu12.04

Xubuntu learning Summary (1): JDK Installation Process (1) download the JDK version jdk-6u41-linux-i586.bin on the sun official website (2) copy the jdk-6u41-linux-i586.bin file to the desired place, for example,/usr/java/, where it is to be

Ubuntu sets redis to start from startup. Today, we are so angry that we are sorry for starting redis. For me, this is not a small job, if you want to fully understand it. Difficulties: www.2cto.com 1 --- redis STARTUP script and shell script writing.

Port SSH in an embedded linux SystemHardware Platform: (arm) Operating System: linux has been using serial port debugging machines, but wired serial port is also inconvenient, debugging equipment must hold a notebook, so try to port SSH to the

If you are familiar with ebtables and iptables about the design of bridge-nf-call-iptables, the latter provides more options than the former, however, this does not mean that the IP layer features richer than the data link layer, because as long as

In Linux, the default cp command has an alias (alias cp = 'cp-I ') and cannot be forcibly overwritten. Even if you use the-f parameter, the file cannot be forcibly overwritten, the following two methods are provided for cp coverage in Linux. 1)

Crack Linux Login Password 1. when the grub screen appears, use the up/down key to select the item that you usually start linux (do not select dos), and then press the e key; 2. again, use the up and down key to select the one that you usually start

Do you want to choose a different one? Solution a few days ago, the company needs to install the Postgresql database and add it to the Linux Service. Some scripts are as follows: case $1 in start) echo-n "Starting PostgreSQL: "su-$ PGUSER-c" $

Note the CONNTRACK_MAX and HASHSIZE in linux. If the concurrency increases during stress testing but the test cannot be completed, you can try to adjust the parameter vi/etc/sysctl. conf added before kernel2.6: net. ipv4.netfilter. ip_conntrack_max =

Shell script running exception in ubuntu: The difference between bash and dash I used bash to write a shell script (to be precise, I typed the script in the book into the computer). In ubuntu, use sh test. sh. sh running, will print out-e (as a

The iptables command can be used to configure Linux packet filtering rules. It is often used to implement firewall and NAT. The configuration of iptables is complex. After mastering the rules, it is not difficult to use iptables to complete the

The linux hardware information probe and linux Command query links are used to develop drivers in the LINUX environment. First, the new hardware should be detected, and then the driver should be developed. Common commands are as follows: Use the

Linux text processing commands Linux has multiple string processing commands, each of which has its own special purposes. Currently I have learned the following commands: cut usage: cut-d 'delimiter (TAB by default) '-f fields (number) grep: Usage:

TOP command and Parameter Parsing Top Command is a common system performance analysis tool in linux. It can display the resource usage of various processes in the system in real time, similar to the windows Task Manager. The following describes how

Modify the apache file size limit in Windows ========================================== Step 1: modify the size limit of the POST File in php5. compile php. ini found: max_execution_time = 30, which is the maximum running time of each script, in

Solution for ubuntu 13.04 without language support: After installing XBMC today, enter the language settings, select Chinese, and the speech interface is blank, I knew that the Chinese package of the software had not been installed... Go to system