Thursday, December 17, 2009

παραδείγματα χρήσης συμβόλων σε command line

Symbol - Function - Example

>
Sends output to a named file. If file does not exist, it creates one. Overwrites existing file
command > somefile

>>
Appends output to contents of a named file or creates a file if none exists
command >> somefile

¦
Sends ("pipes") the output of command1 to the input of command2
command1 ¦ command2

&
Used to combine two commands. Executes command1 and then command2
command1 & command2

&&
A conditional combination. Executes command2 if command1 completes successfully
command1 && command2

¦¦
Command2 executes only if command1 does not complete successfully.
command1 ¦¦ command2

@
Used in batch files at the beginning of a line to turn off the display of commands
@echo off

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