Linux--Summary of system programming knowledge

1. Common instructions and permission instructions

①, Von Neumann architecture

②, environment variables

③, Linux file types, Linux extensions Name, principle of running Linux shell instructions, Linux permission management

④, instructions:
a. Installation and login commands: login, shutdown, halt, reboot, install, mount, umount, chsh, exit, last;
b. File processing commands: file, mkdir, grep, dd, find, mv, ls, diff, cat, ln;
c. System management related commands: df, top, free, quota, at , lp, adduser, groupadd, kill, crontab;
d. Network operation commands: ifconfig, ip, ping, netstat, telnet, ftp, route, rlogin, rcp, finger, mail, nslookup;
e. System Security-related commands: passwd, su, umask, chgrp, chmod, chown, chattr, sudo ps, who;
f. Other commands: tar, unzip, gunzip, unarj, mtools, man, unendcode, uudecode2, Vim Use gcc, g++, gdb, ctags, makefile, make
3. The concept and programming of process
①, the concept of process

②, process description: process control block, process label Character, process location,

③, process status

④, process priority

⑤, process execution

⑥, process environment

⑦, Actual users and effective users

⑧, Process creation: fork, vfork

⑨, Process waiting: wait, waitpid

10, Process program replacement: execl , execlp, execle, execv, execvp, execve,

11. Process termination: exit _exit

4. Inter-process communication
①, Pipe
②, Named pipe (FIFO )

③.
a. Create a thread pthread_create()
b. Three ways to terminate a thread?
c. Thread waiting
③, thread separation
④, thread synchronization
a.mutex (mutex)
b. Condition variable
c. Semaphore
d .Producer-Consumer

e. Read-write lock

6. Signal
①. The concept of signal

②. Signal generation: three ways

③. Signal processing methods: three

④. Blocking signals: signal delivery, pending,

⑤, SIGCHLD

7. Terminal, job control and daemon
①, process group, job, session

②, terminal

③, job control

a.Session and process group

b. Job-related signals

④, Daemon process

a. Create daemon process


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