Multiple commands on one command line : command1;command2;...
Input - Output redirection
Syntax : Write to File : Linux-command 'greaterthan-symbol' filename
Append to File : Linux-command 'two-greaterthan-symbol' filename
Read from File : Linux-command 'lessthan-symbol' filename
Pipes : Connect the O/P of one program to the I/P of another
Syntax : command1 | command2
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