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how to automatically create a file?

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Operating Systems Linux how to automatically create a file?
# 1  
Old 03-12-2011
how to automatically create a file?
how can i automatically create a file on Linux? like a process that searches for the file and if the file does not exist, it automatically makes the file
Last edited by roozis; 03-12-2011 at 10:42 PM.. Reason: forgot a word
# 2  
Old 03-13-2011
In shell:
Code:
touch /path/to/file/filename

This creates an empty file if the file does not already exist. It also updates the file time to the time the command was executed.

This just creates the file but does not change file times on an existing file
Code:
[ -f  /path/to/file/filename ]  || >  /path/to/file/filename

This User Gave Thanks to jim mcnamara For This Post:
roozis
# 3  
Old 03-13-2011
what i dont understand is the second, how come is there 2 lines between the code?
# 4  
Old 03-13-2011
|| means OR that mean : if the left statement has a return code that differs from 0 then execute the statement that is on the right.

---------- Post updated at 05:32 PM ---------- Previous update was at 05:29 PM ----------

-f test the existence of the file : if false (return code differs from 0) then creates the file
This User Gave Thanks to ctsgnb For This Post:
roozis
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