Linux commands 13

File Lookup method[email protected] ~]# which useradd #查看可执行文件位置/usr/sbin/useradd[Email protected] ~]# Whereis!$ #查看可执行文件的位置以及相关文件Whereis UseraddUseradd:/usr/sbin/useradd/usr/share/man/man8/useradd.8.gzgrep filtering#grep ^# a.txt #以 # Start Display#

A brief description of the naming pipeline FIFO for Linux interprocess communication

Talking to the pipe above, you can communicate between the processes that are related.How do I communicate with unrelated processes? This article will talk about named pipe FIFO.First, the conceptNamed pipe FIFO, which provides a path name

Do not restart Linux add disk, use Soft link for mount point expansion

When using Linux, there are times when the initial disk space allocation is not enough to be used in the case of the need to expand the mount point, which requires us to mount the new disk. But if we mount the disk while Linux is running, and Linux

Linux system Programming--special process zombie process

Zombie Processes (Zombie process) The process has finished executing, but the resource occupied by the process has not been reclaimed. This process is called a zombie process . At the time each process exits, the kernel frees all

Deployment Projects under Linux

Svn+tomcat9.0+maven3.3+jenkins implementation of Web project automatic construction and remote publishing under Linux CentOS7 (2015-12-20 19:17:03) reproduced Tags: svn tomcat maven Jenkins Auto build remote Release Category:

Linux Command Line learning-dig (DNS finder)

In web development. Always familiar with the HTTP protocol. One of the first processes to go through before initiating an HTTP start is DNS resolution. Simply say is how the domain name finally resolves to the actual serverip process.A powerful tool

"Research on the principle of Coredump" Linux version x86 7.7 section set object

Take a look at Bits/stl_map and Bits/stl_set can see the definition of map and set such as the following:_key, TypeName _tp, typename _compare = Std::less, > > class map, public:89 typedef _k EY Key_type; a typedef _TP Mapped_type; The Air

Trojan Horse and Clear Trojan in Linux server

I. BACKGROUNDAt night to see a server traffic runs very high, obviously and usually not the same, the flow reached 800Mbps, the first feeling should be in the Trojan, was people as a broiler, in a large number of contracts.Our server for the best

The eighth chapter of Linux Device Drivers allocates memory--note

This chapter focuses on the memory management of the Linux kernel. Inside of the Kmalloc function Incorrect acquisition of memory space zeroing The allocated area is also contiguous in physical memory Flags, number of references

Linux builds DNS two multi-domain name resolution

Linux builds DNS two multi-domain name resolutionContinue on an articleSVR5 Server CENTTOS6 192.168.4.5pc205 Client CENTOS6 192.168.4.405Domain namehellc.cnhellc.com.cn----------------------------------------Add hellc.cn Zone (append in

Linux Little Exercise

1. Display the lines in the/proc/meminfo file that begin with size s:Law One:Law II:FahsarmLaw IV:2. Displays the lines in the/etc/passwd file that do not end in/bin/bash:3. Show user RPC default shell program:4. Find out the two-bit or three-digit

Linux users, groups, and Rights Management (II)

The previous article completed some user and group management commands, followed by rights managementRights Management :Each directory or file has a corresponding permission bit to restrict whether the user has permission to "use"Process Security

Setup of crontab timed tasks for Linux applications

The implementation of Linux timing tasks are: cron, Anacron, at, and so on, here mainly about cron services.Noun Explanation:Cron is the service name, Crond is a background process, and crontab is a custom-made scheduled task table.Package

Linux Basic Knowledge day-8

Shell Introduction:The shell is an instruction parser outside the core program kernel, a program, and a command language and programming language.The shell is the command parser, the user enters the command, it parses, and then gives the kernel to

Using the compiler to install VMware Tools in a Linux virtual machine

To use the compiler to install VMware Tools in a Linux guest operating system, do the following: Make sure that the Linux virtual machine is powered on. If you are running the GUI interface, open the command shell.Note : Log in as

Linux Operating System Fundamentals (vii)

Linux Service (ii) 1.NFS service constructionInstallation:Yum Install Rpcbind nfs-utils-yConfiguration:The NFS service configuration file is/etc/exports, which is the primary NFS configuration file, but the system does not have a default value, so

RPM installation commands for Linux commands

Under the Linux operating system, almost all of the software is installed, uninstalled and managed through RPM. RPM is all called the Redhat Package Manager, and is a software proposed by Redhat Corporation to manage packages under Linux. Linux

Day 9 Linux Samba & Ngnix

(excerpt) Samba servicesI. Introduction of SAMBASamba is a free software that implements the SMB protocol on Linux and UNIX systems, consisting of servers and client programs. SMB (Server Messages block, information service blocks) is a kind of

Basic knowledge of Linux (vii)

Basic knowledge of Linux (vii)One, Service for NFSNFS is the abbreviation for the network file system, which is the web filesystem. A contract for the decentralized file system, developed by Sun, was announced in 1984. The function is to enable

Linux environment Programming--waitpid and fork and EXECLP

Waitpid Waitpid (Waiting for the child process to break or end)Table header File#include #include Define function pid_t waitpid (pid_t pid,int * status,int options);Function descriptionWaitpid () will temporarily stop the execution of the current

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