Linux

Expect is used to provide automatic interaction with the tool. For example, if you want to ssh into the server, each time you enter the password you feel trouble, then you can use expect to do automatic interaction, so that you do not have to enter

Copying: CopyCP81 Dec 3: file11 3Dec:Move: MoveMVmvdir/Rename: RenameMVmv dir1 Dir2 #dir2存在, move operationRemove: RemoveRMrmdir #移除dir目录Create files: Touch and >Touch a.txt >b.txt 010 Dec 3: a.txt 10 Dec 3:Create directory:

KernelDownload kernel, unzip and compileMake Arch=arm cross_compile=arm-linux-gnueabi-o=. /tl DistcleanMake Vexpress_defconfig arch=arm cross_compile=arm-linux-gnueabi-o=. /tlMake Arch=arm cross_compile=arm-linux-gnueabi--j8 o=. /tlRootfsDownload

Install or upgrade an existing system Install the basic video driver Rescue system Installation Booting from a local drive Memory test The first item is usually selected.Test the media before installing, with the usual dot ok

1. From the protocol perspective, look at the packet flow:########################## #资源子网: First Floor# User Space ###########################                        ## kernel space #通信子网: three layers#########################2. From the kernel

The process and memory of Linux are two great mountains, and the understanding of the kernel is not complete without turning over the two mountain blocks.For Linux memory management, do some preparatory work before you start.First Bing to Quora's

Swap space has two forms: one is the swap partition and the other is the swap file. In short, it reads and writes all disk operations.Linux memory manages the entire memory through virtual memory, which manages physical memory and also manages swap

On Linux systems, switch directories with the command CD (change directory) to view the current directory of command PWD (print working directory).For example, the current directory is:/home/keysystem/desktoppwd/home/keysystem/To enter the root

.tar.gzAnd.tgz Decompression: Tar zxvf FileName.tar.gz Compression: Tar zcvf FileName.tar.gz DirName tar Unpacking: Tar xvf Filename.tar Package: Tar cvf filename.tar DirName(Note: Tar is packaged, not compressed!) ）

Major file Services Vsftp, Samba, NFSContrast: server name User Client platform   Use range Service port ftp   windows/ Linux/unix/macos Publishing site, file sharing  

Configuration parameters of the scheduler/proc/sys/kernel/sched_min_granularity_ns (4000000ns):Sysctl_sched_min_granularity, which represents the minimum process run time , prevents frequent switching, and for interactive systems such as desktops,

Https://www.cnblogs.com/cobbliu/p/3627061.htmlA timing function for Linux to get the current time: Time (2)/time_t (SEC) Ftime (3)/struct TIMEB (ms) Gettimeofday (2)/struct Timeval (μs) Clock_gettime (2)/struct Timespec

Linux under tomcat6.0 and JDK installationThe steps are as follows:1. Upload apache-tomcat-6.0.37.tar.gz and Jdk-6u13-linux-i586.bin to/usr/localAdd executable permissions to these two files# chmod +x apache-tomcat-6.0.37.tar.gz jdk-6u13-linux-i586.

1. Configure sudo permissionssudo configuration information is saved in the/etc/sudoers file and can be modified using VI. However, using VI modification requires the root user to set permissions, which can be modified directly using

Yum (Yellowdog Update Modifier) rpm front-end program to address package-dependent dependenciesTurn on the mount before building and set it to bootMount the disc to/MISC/CDYum configuration fileDelete or back up the system's own configuration files

the difference between/etc/profile and/ETC/PROFILE.D under the Linux environment Difference: 1. Two files are set environment variable file,/etc/profile is a permanent environment variable, is a global

1. Linux commands, I. Linux development board operation commands1. view the command:System related:** Task Manager: gnome-system-monitor** SEARCH Command: findInstance: find-name gpio * search for files starting with "gpio" in the current

Ubuntu 17.10 uses apt to build a lamp environment (Lite version) and ubuntu17.10 This article is mainly used to quickly deploy the lamp environment based on php 5.6, to see the detailed installation including virtual host configuration, please refer

Linux swap space, linux swap Swap space has two forms: swap partition and swap file. In short, the read and write operations on it are disk operations. Linux memory manages the entire memory through the virtual memory. The virtual memory manages

Linux yum and linuxyum Yum (Yellowdog Update Modifier) rpm front-end program, which can solve software package-related dependencies Enable mounting before building and set it to boot Attach the cd to/misc/cd Yum configuration file Delete