Linux

1.1 sedIntroduction1. Sed-stream editor2. Sed features and versions:Working with text files, logs, configuration filesAdd, delete, modify, querySed--version3. Syntax format:sed [ options ] [sed directive ] [ input file ]Sed-i.bak ' S#boy#girl#g '

I. Catalogue INTRODUCTION/boot storage kernel, file storage point required for system startup/bin stores all common commands that users can perform/dev Interface Device/etc about system settings and management filesHome directory for all ordinary

Only one permanent modification is introduced here.To modify a profile using the root user:/etc/security/limits.confAdd the following content* Soft Nproc 10240* Hard Nproc 10240* Soft Nofile 10240* Hard Nofile 10240Where Nofile corresponds to

Ssh-keygenGenerates a public and private key pair.Ssh-copy-idCopy the local public key to the remote machine's Authorized_keys file, Ssh-copy-id can also give you the right to the remote machine home, ~./SSH, and ~/.ssh/authorized_keysFirst step:

One view system PCI device, motherboard, sound card, video card, network card, etc.# LspciTwo View CPU information# More/proc/cpuinfo1: View the number of physical CPUs on the system#Cat/proc/cpuinfo | grep "Physical id" | sort | uniq | wc-l2: View

1. Components of the Linux kernel:Kernel file:Kernel object: Kernel moduleRAMDisk: Auxiliary file that is used to drive the hardware device where the ROOTFS resides.2. Linux startup process:POST--->boot Sequence (boot sequence set in BIOS)---> Boot

I. INTRODUCTION of LinuxLinux is a free-to-use and free-spread open source (Unix like) Unix operating system,The full name is called Gnu/linux.The advent of Linux began with a Finnish university student named Leos, Thomas (Linux Torvalds). Released

First, download Tomcat1, to the official website to download the installation package: https://tomcat.apache.org2, the operation needs to install the JDK, this download version is apache-tomcat-8.0.48.tar.gzSecond, installation1. Create the

How to view version information under Linux, including the number of bits, version information and CPU core information, CPU specific models, etc., the entire CPU information at a glance.1. # uname-a (Linux view version current operating system

Linux: nginx reverse proxy pointing to multiple applications, linuxnginx The nginx. conf configuration file is as follows:# User nobody; worker_processes 1; # Error_log logs/error. log; # error_log logs/error. log notice; # error_log logs/error. log

Compression and packaging details, compression and packaging details. Gz gzip compressed file. bz2 bzip2 compressed file. tar package file (uncompressed) .tar.gz tar is compressed by gzip. tar. after bz tar is packaged, It is compressed by bzip. tar.

In Linux, how does one view the current concurrency traffic and linux traffic of the server?The number of server visitors can be listed through the command netstat-pnt | grep: 80. For example, if you request the server to access the previous page,

Use commands of CentOS 7 in Linux to update the yum source, centosyum Follow the instructions to back up the source (use the following command to rename the original source. If there is an error, change it back ): [Root @ peipei3514 ~] #

Static code ai details, static ai details 1. Remove this debuggerstatement Remove debugger 2. "factory" expects "1" arguments, but "2" were provided The corresponding parameters are too many. 3. This caseduplicates the one on line 942 Repeated

Debian9 image Installation Problems, debian9 image Installation Debian https://www.debian.org/distrib/ Debian9 has three image files. The first one contains the system. The second and third are the installation packages of some software. You only

Linux socket programming: simple client and server, linuxsocketWhat is socket? Socket originated from Unix, and one of the basic philosophies of Unix/Linux is "Everything is a file". You can use the "open-> read/write-> close" mode to operate. In

Centos6.5-install dnsmasq, 1. UseYum install dnsmasq-yInstall dns (including dns server and dns proxy) 2. Check whether the dnsmasq has been installed successfully. [Root @ localhost ~] #Rpm-q dnsmasq Dnsmasq-2.48-18.el6_9.x86_64 [Root @ localhost ~]

[Python] basic knowledge exercise question 1, python exercise question1. Two ways to execute Python scripts 1. python zhurui. py2. Brief the relationship between bit and byte 8-bit one byte3. Briefly describe the relationship between ascii, unicode,

Centos6.5-install DHCPServer, 1. Check whether dhcp has been installed. [Zfp @ localhost ~] $ Rpm-q dhcpPackage dhcp is not installed[Zfp @ localhost ~] $ 2. query dhcp-related rpm packages in the yum network source. [Root @ localhost zfp] # yum

Ubuntu17.10 keyboard input system IBus, ubuntu17.10ibus In December 31, 2017, I finally decided to install my laptop on Ubuntu17.10 and completely erase Windows. Previously, it was only installed on virtual machines, but it was still determined. I