linux scripting basics

environment, interrupts are handled by each processor. Binding interrupts to a single processor can improve the performance of the system.1.10. What is a threadA thread is an execution unit that is produced in a process and runs in parallel with other threads in the same process. They share the same resources, such as memory, address space, open files, and so on. They can access data for the same set of applications. Threads are also referred to as lightweight processes. Because they share reso

permissions operation (REcursive recursive)Example: chmod u+x a.txtUse numbers to represent permissions (r=4,w=2,x=1,-=0)Example: chmod b.txtRWX with binary notation is 111, decimal 4+2+1=7R-x with binary notation is 101, decimal 4+0+1=5Seventh chapter: RPM Package ManagementRPM is an abbreviation for the Redhat Package Manager (Redhat Packages management tool), a file format name that, although Redhat, is open-ended and now includes Redhat, CentOS, Distributed versions of

versions) toolset.There is usually a system command with the same name, such as the echo command in bash and the/bin/echo are two different commands, although they are roughly similar in their behavior. When you type a command in bash, the system will first see if he is a built-in command, and if not, see if it is a system command or a third-party tool. So typing the echo command in bash actually executes the Bash command in the Bash toolset, which is the built-in command instead of/bin/echo th

C language basics Lesson 1 Linux environment configuration practices: httpserver and linuxhttpserver C language basics Lesson 1 Linux environment configuration small practice httpserver The first environment requires the redhat virtual machine operating system Enable redhat Firewall 2. Check WWW (HTTP)

awakened, when in a non-interruptible sleep state, can only be used wakeup, etc. when the process is in a paused state, The signal can be sent to the ready state; When the zombie state is stopped, the parent process has not called the wait query state, and once the parent process has called wait to get the child process information, the process task data structure is freed.About the Linux file system and source directoryAbout the

commands:Mkfs. File system TypeFor example, the command to format a partition/dev/sdb1 as a EXT4 file system is:Mkfs.ext4/dev/sdb16. Set the label (partition name) for a partition (see Linux System Management P405)1) Master the function of the E2label command: Set or view the label name of a device.2) Flexible Application E2label Command set Label:A) For example: The command to view the label of the/DEV/SDB1 partition is:E2label/dev/sdb1b) For exampl

is, the package is minimized, yum installation package is minimized, the package is not installed. Start-up service is minimized, that is, useless services are not turned on. The operation commands are minimized. For example rm–f test.txt without RM–FR test.txt Logging on to Linux users is minimized. The normal user authorization permission is minimized, that is, to give only the necessary management system commands.

Linux System tuning Basics#显示进行在哪个cpu上运行[Email protected] ~]# PS Axo PSR,2 NTPD1 Qpidd3 Pickup3 sshd0 Bash2 Pscomm#显示进行在哪个cpu上运行, and show the PID of the process[Email protected] ~]# PS Axo psr,comm,pid2 ntpd 37751 Qpidd 99983 Pickup 262392 sshd 264481 Bash 264501 PS 26496#绑定进程号为9998的进程到第四颗CPU上[[email protected] ~]# Taskset-p-C 3 9998PID 9998 ' s current affinity list:0-3PID 9998 ' s new affinity List:3#绑定进

Linux basics: File System Linux File System Structure/bin stores binary files (executable commands such as rm, cd, and cp). All Users have the permission/dev (device abbreviation) storage Device Files in Linux, all hardware devices are abstracted into a file/boot storage kernel and startup program files the most import

Basics of Linux: getting help doesn't have to remember everything. Linux provides very detailed help tools and documents, so you must get used to poor help documents, this greatly reduces the need to remember and improves the efficiency of Help. Almost all commands can use the-h or -- help parameter to obtain the usage method, parameter information and other $ co

Linux basics-Modify the startup mode/etc/inittab Linux regards X-Window (X) as only one program, not bundled into its kernel. In UNIX/Linux, the running level is generally divided into 7 levels (Level 9, but the actual application is level 6 and the Level 1 is retained ): 0 system downtime 1 single-user mode 2 Multi-Us

Linux Network basics-Linux Enterprise Application-Linux server application information. For details, refer to the following section. 1. Statement2. Introduction to network-related configuration files2.1/etc/hosts Contains a list of known hosts (in the local network. If the system IP address is not dynamically obtaine

First, the requirements of Linux learning:1. Calculator Introduction not hardware-related knowledge;2. Start from Linux installation led order;3. Basic skills of Linux operating system: "User, Group Souvenirs", "View Souvenirs", "program definition" and so on;4. Be sure to learn the VI document editor:5. Shell does not have shell script learning:6. Be sure to be

enter a password, it is not displayed on the screen, and you are finished.4. Why doesn't it stop when you use the ping IP command?In Linux is not automatically stopped, manually stop, CTRL + C. Or specify the number of pings.ping IP; not stop automatically.Ping-c n IP; indicates ping n times.Ping-s 2048 IP; Represents a ping test package that sends 2K each time.Affirm: This article is I in the Linux study

├─XFS-buf/dm-0├─XFS-buf/SDA1├─XFS-buf/SDB1├─XFS-cil/dm-0├─XFS-cil/SDA1├─XFS-cil/SDB1├─XFS-conv/dm-0├─XFS-conv/SDA1├─XFS-conv/SDB1├─XFS-data/dm-0├─XFS-data/SDA1├─XFS-data/SDB1├─XFS-eofblocks/d├─2*[xfs-eofblocks/S]├─XFS-log/dm-0├─XFS-log/SDA1├─XFS-log/SDB1├─XFS-reclaim/dm-├─XFS-reclaim/SDA├─XFS-reclaim/Sdb├─xfs_mru_cache├─xfsaild/dm-0├─xfsaild/Sda1├─xfsaild/Sdb1└─xfsallocView CodeNote that CENTOS7 does not have pstree by default and needs to be installed yum-y the install PSMISC commandsecond, har

==================== Equipment Tree and the new version of platform simple description ===================1) Platform Device driver frameworkThe scope of this framework applies: hardware-dependent drivers.as long as the compatible match, then the node information will be passed to the driver, if the matching device tree node cannot be found, then the driver will not be started, the benefit of this framework is that the same system image with multiple drivers can be compatible with a different de

A basic knowledge of Linux1.1 ls Displays the current directory or file Ls-l view the details of the file Ls-ld view the directory details-rw-r--r--. 1 root root 969 2 months yum.confFirst field: file type; the types of files in Linux have the following categories 1-binary file d directory C character device fileB Block Device file (block), p (pipe) pipe file, S (scoket) socket file, L link file.The second character rw-r--r--9 characters each three a

Features of SambaInstallation of SambaStart, stop, restart of samba servicesConfiguration of Samba ServicesMaster Profile for Samba servicesSamba Server Configuration InstanceSamba Client SettingsWindows ClientLinux ClientHomework after class"Content of this section"1. Mastering the functionality of Samba: Samba is a Web server for sharing files between Linux and Windows.2. Mastering the start, stop, and restart of samba servicesService SMB Start|stop

/[email protected] yum.repos.d]# ls #rhel. Repo is generated according to the local Yum configurationRhel.repo Rhel-source.repo[email protected] yum.repos.d]# cat Rhel.repo #修改为以下内容[Rhel-ftp]name=red Hat Enterprise Linux 6Baseurl=ftp://192.168.8.42/pub #指定yum源地址Enabled=1Gpgcheck=1Test:[email protected] ~]# Yum install bind #安装DNS服务7. Mastering the use of Yum installation softwareYum–y Install software name8. Mastering the use of Yum to remove software

(kern_info "Got%darguments in array\n", ARR_ARGC);return 0;}Static Void__exit hello_2_exit (void){PRINTK (kern_info "Hello drivercleaned up\n");}Module_init (Hello_2_init);Module_exit (Hello_2_exit);Second, the driver module compilationCompile Note: The kernel source path must be well-configured and cut-compiledIfeq ($ (kernelrelease),)#KERNELDIR? =/home/lht/kernel2.6/linux-2.6.14Kerneldir =/lib/modules/$ (Shell uname-r)/buildPWD: = $ (SHELLPWD)Modul