Find command in unix 2 dev null

I'm running the below command on my AIX box and it keeps giving me the message that the file doesn't exist. I know the file don't exist, but I don't want to see the error. I apologize if this question has been answered else where or is too elementary. How are these two different? They both prevent output and error from being displayed. Hi expert, May I know what is the difference between below cron tab entry? Maybe it's an stupid question but remeber I'm Junior..

I use command line to run programs, and some of them gives a lot of information when, for example, you open a window or other actions. RedHat Commands. OpenSolaris Commands. Linux Commands. SunOS Commands. FreeBSD Commands. As the previous command ran successfully, the exit status is 0. Otherwise, the exit status will be different. What happens when you try to run an invalid command?

Now, we need to know about the file descriptor. In the UNIX ecosystem, these are integer values assigned to a file. Using the file descriptor 1 and 2 in this situation , we can redirect the stdout and stderr to other files. For starter, the following example will redirect the stdout of the echo command to a text file. If not specified, bash will use stdout by default. Now, using the redirection, we can get a clearer output.

The output looks much better, right? How do we do that? Connect and share knowledge within a single location that is structured and easy to search. Essentially meaning, just get rid of the error messages. I'm therefore proposing that the 2 in the code is a typo and the author intended to write. That is, to echo either string, while discarding the actual lines that matched. Also note the corrected! The -q makes grep quit as soon as a match is found, and also makes it quiet it does not output the matched lines.

The getent passwd command would exit with a non-zero exit status if the given username was not found in the passwd database. Sign up to join this community. The best answers are voted up and rise to the top.

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