1. Programming Practices
Codes do not write Chinese.
Only use local variables, global variables can not be used.
Unary operators:! ~ Bitwise inverted
Or with a binary operator shift plus
2. Review
1.Shell wrapped core shell
2.Kernel kernel
Every operating system has a kernel
Do not interact with the program
function: the system call: Provides functions eg file open
Change the current directory
Communication with other programs
Program only accepts calls
3. file access by name
4. standard input and output file
5. a conduit into another command input command output
3.git for version control version control
Checksum record every change has a signature forgery
The version number eg python3.7
Major changes on the front of the decimal point
After a small change on the decimal point
Linux kernel
Odd unsteady
Even-stable
Windows95 Windows97 year mark
WindowsEXP Exp experience abbreviation
The modified SHA-1 hash generated serial number
Good hash no way the two inputs have the same output
Output difficult to construct meaningful input to ensure unique serial number
Founding empty local library
Library cloned from the distal end to a local url universal reversed location means may refer to, but is not
URL www.ecnu.edu.cn
https://github.com/rust_lang/rust/issues/1020
http https protocol
https encrypted http
ftp file transfer
domain name
rust-lang / rust / path
issues / 1020 resources / equipment issues filename