0209-Linux and git basic command

Linux and git basic command [ EASY | COMPUTER | GIT ]

> write print text to a file >> append text to a file echo command without -n flag will automatically add newline character after the prints.

• Even small changes in the text will generate completely different SHA1 hash.(In cryptography, SHA-1 (Secure Hash Algorithm 1) is a hash function which takes an input and produces a 160-bit (20-byte) hash value known as a message digest – typically rendered as 40 hexadecimal digits. )