Shulou(Shulou.com)06/02 Report--

SRC (system Resource Controller): tool for classifying and managing processes scheduling status of processes: 1. Running status 2. Ready state 3. A blocking state thread is a schedulable entity within a process and an execution unit of the process. The basic unit of processing scheduling is the thread. After adding nohup before the command, the child process can still run the shell environment variable set by the export command in the parent process after the death of the shell, which can be passed to the child process, but the environment variable set by the export command in the child process can not be passed back to the parent process. Use the export command with no arguments to display the environment variables that are set. The env command can view all environment variables inherited from the parent process. Swapper process (process 0) the process created when the system is booted, the ancestor of all processes, the scheduling process of the system process, and the init process created by him. Use the ps command without any parameters to display only the process status of the current terminal. Ps-f: display details-e: display the status of each process in the system (except the core)-l: display details (more detailed than-f)-t ttyname: show the processes of other terminals-u username: show the processes of the specified user-k: show the core processes-d: show the processes divided All processes except the group leader-A: show all processes-m: show threads-o THREAD: show the detailed state of the thread (used with-m) the status of the process: O: there is no A: running W: exchanged state. Intermediate state I: waiting to start idle state Z: cancel T: stop thread state: O: there is no R: running S: sleeping W: exchanged state. Intermediate state T: stop Z: cancel the zombie process: the process is dead, but the body remains in the process table (marked as a symbol). The kill command cannot be killed. Nice value (0-39) kill command kill pid terminates a process kill-9 pid kills a process kill-90 terminates all processes created, exits the system and returns to the Login state kill-9-l kills all processes created, but does not exit the system / proc file system can start or stop threads in a process, and can also track system calls, signals, and the address space of read / write processes. Procwdx command displays the current working directory of the process procwdx PID procfiles command displays description information of all files opened by the process procldd command displays a list of dynamic loaders, including shared objects procstop stop process running procrun starts the process stopped by the procstop command core file when the process terminates abnormally The system writes the data in the address space corresponding to the process to the core file (this process is called dump).

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.