LINUX Notes-redirect:<,<<,>,>>

Command>filename redirect the standard output to a new file

Command>>filename redirecting standard output to a file ( append )

Command 1>filename redirect the standard output to a new file

Command>filename 2>&1 redirect standard output and standard error to a file

Command 2>filename redirect the standard error to a new file

Command 2>>filename redirect the standard error to a file ( append )

Command >>filename 2>&1 to redirect standard output and standard error to a file ( append )

The command <filename >filename 2 command commands the filename file as the standard input to filename2 file as standard output

Command <&m The file descriptor m as standard input

Command >&m redirect The standard output to the file descriptor m

Command <&-to turn off standard input

LINUX Notes-redirect:<,<<,>,>>