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Process control Create process fork //Create child process pid_t fork(void); //Success: the parent process returns the PID of the child process, and the child process returns 0; Failure: Return - 1, set errno value The parent-child process who preempts the CPU time slice will execute first Global variables cannot be shared between p ...

1. Introduction The tput command initializes and operates your terminal session through the terminfo database. Using tput, you can change several terminal functions, such as moving or changing the cursor, changing text properties, and clearing specific areas of the terminal screen. Like most commands in UNIX, the tput command can be used ...

1, Background          I have accumulated a lot of commands related to the server in my work, which are commonly used. Record and share them with you. I hope it will be helpful. 2, Common commands 1. vim enters the file, exits the editing mode, executes DD to delete a whole line, and 20dd to delete 20 ...

Process and thread definition A process is a program in execution (the object code is stored on the media). A process includes not only the running program, but also some other resources, such as open files, suspended signals, internal kernel data, processor status, etc. An execution thread is projected in a section of memory, which also c ...

lsof is system management/ security Uber tools. Call this tool lsof a real name, because it means "lists open files". One thing to remember is that in Unix, everything (including network sockets) is a file. Interestingly, lsof is also one of the Linux/Unix commands with the most switches. It has so many switches, and it has many opti ...

chapter 1 system call 1.1 Process and memory int fork() Create a process, the parent process returns the pid of the child process, and the child process returns 0int wait(int *status) Status gets the status returned by the child process exit, and the return value of wait is the pid of the child process exit. If the process calling wait() has ...

Linux system call refers to a set of "special interfaces" provided by the operating system to user programs through which user programs can obtain special services provided by the operating system. To better protect kernel space, programs are divided into kernel space and user space, which ru ...

cmake basic introduction (1) Official help documents CMake is a cross platform make. CMakeLists.txt The brief introduction is as follows: # Auto CMakeLists.txt: frame with cppunit use for lintcode/leetcode # minimum cmake version cmake_minimum_required(VERSION 3.7) # cmake minimum version ...

brief introduction Puppet is a centralized configuration management system for Linux, Unix and windows platforms. It uses its own puppet description language to manage configuration files, users, cron tasks, software packages, system services, etc. These system entities are called resources by puppet. The design goal of puppet is to simplify t ...

1, Functional requirements Three threads are used. Thread 1 is used to listen to user input and as listener of other two threads. The main content of thread 2 is to output "hello 2" string every other period of time. Thread 3 is used to output "hello 3" string every other period ...