Linux

command line Daquan learn and take notes >> Summer studyChapter One: What is a shell? 1 shellThe shell is an explanatory program that interacts with the Linux kernel, and we can interact with the operating system through the Shell terminal

When Linux is looking, access to some directories may not be accessible and many error messages are printed1. root directory file contents-bash-3.2$ lsAnaconda-ks.cfg Bea Desktop Lib Wls1036_generic.jar2. Find the file ending with. Log,-bash-3.2$

Linux red had set root boot password and menu password1. Set the configuration file for the boot password in/etc/grup.confRoot#vim/etc/grup.conf650) this.width=650; "title=" 5.gif "src=" http://s3.51cto.com/wyfs02/M02/3B/CC/wKioL1O_ Rwex7gnkaab6ahbs-

Shell string comparison, judging whether it is a numeric   two-dollar comparison operator, compare variables or compare numbers. Note the difference between a number and a string.   Integer comparison  -eq  equals, such as:if [  "$a"  -eq  "$b"

With the widespread application of Linux, especially in the network applications, there are a large number of network servers using the Linux operating system. Because Linux desktop applications and Windows have a certain gap, so in enterprise

When doing kernel-driven development, you can use the files under/proc to get the appropriate information for debugging.Most of the files under/proc are read-only, but for the completeness of the example, a write method is provided.Method One: Use

Linux Memory management is mainly divided into two parts: Physical address to virtual address mapping, kernel memory allocation management (mainly based on slab).Mapping between physical addresses to virtual addresses1. ConceptPhysical addresses

After the installation of the Linux system, it is found that Firefox video is not playing and always prompt to install Flash. And according to the Firefox browser prompts Flash plugin installation always failed, wood can only manually install Flash

1. Find commandThe Linux find command is very powerful for finding files, and can be used to find files by time, user group, filename, file type, permissions, size, etc.2. Use of FindSee the introduction through Find--help or man find.$

Environment: centos6.4_x64Installation:Yum-y Install tigervnc*Configuration:#执行vncserver命令, Initialize VNC[Email protected] ~]# VncserverYou'll require a password to access your desktops.Password: #输入密码Verify: #确认密码New ' X ' Desktop is linux:1

One, Linux under View CPU cache series, each level sizegrep CacheThe example results are as follows:Second, see how the cache is associatedView the appropriate folder in the/sys/devices/system/cpu/If you see how many groups are in the first-level

What is the difference between the Ext3 file system and the Ext2 file system? At some point, a user writes data to a Linux system, when the system is powered down or the system core is faulty, and the data written only has inode table and DataBlock,

I. Description of fault phenomenaNAS OS kernel for Linux, with the storage of 16 hard disks, a total of two groups, each set of Raid5,linux operating system does not start normally, in the service boot to cups there is stopped, the key CTRL + C

Linux file time resolutionthe reason for writing this small article is that you have done a project before, you need to periodically transfer the document, perhaps a professional noun called rollover. Then it is necessary to determine whether a file

Linux UsersLinux is a multi-user task system. Each user account can belong to one or more groups. In the/etc/passwd. Store user account information[Email protected] ~]#

Irrlicht 0.1 Engine source Code Analysis and Research (i.)http://blog.csdn.net/wudijunjun/article/details/6376502Http://baike.baidu.com/view/623466.htm?fr=aladdinhttp://blog.csdn.net/zhaole20094463/article/details/8692048ubuntu12.10 establishment of

Linux find to remove error messages, linuxfind In Linux, access to some directories may not be permitted, and many error messages may be printed. 1. root directory file content -Bash-3.2 $ lsAnaconda-ks.cfg bea Desktop lib wls1036_generic.jar. 2.

Linux executes multiple commands consecutively and linux Multiple commandsIf each command is separated by ";", the next command will be executed no matter whether the command at the front is successfully executed or not.Here, the echo in the second

Simple and Easy-to-use calculator bc in Linux1. About bcBc is an arbitrary precision calculator language. It is usually used as a calculator in linux and is easy to use. It is equivalent to a calculator in windows.2. Supported OperatorsBasic

Add/delete Linux users and groups and delete user groups in linux 1. User Creation:Adduser phpq // create a phpq userPasswd phpq // set a password for the phpq user 2. Create a working groupGroupadd test // create a test workgroup 3. Create a user