This answer probably goes deeper than the use case warrants, and find 2>/dev/null may be good enough in many situations. GNU find in particular has a myriad options not available in other versions - see the currently accepted answer for one such set of options. If you wish to adapt to the specific version of find you have on your system, there may be alternative options available. This will work on any variant of Unix with any Bourne shell derivative (Bash, Korn, …) and any POSIX-compliant version of find. There are endless variations on this theme, depending on what you want to do. The final redirection could be regarded as optional at the terminal, but would be a very good idea to use it in a script so that error messages appear on standard error. The grep filters the standard output (you can decide how selective you want it to be, and may have to change the spelling depending on locale and O/S) and the final >&2 means that the surviving error messages (written to standard output) go to standard error once more. The net result is that messages written to standard error are sent down the pipe and the regular output of find is written to the file. The > files_and_folders sends standard output (but not standard error) to a file. The 2>&1 sends standard error to the same place as standard output (the pipe). The pipe redirects standard output to the grep command and is applied first. The I/O redirection on the find command is: 2>&1 > files_and_folders |. 2>&1 > files_and_folders | grep -v 'Permission denied' >&2 If you strictly want to filter just standard error, you can use the more elaborate construction: find. 2>&1 | grep -v 'Permission denied' > files_and_folders If you really want to keep other possible errors, such as too many hops on a symlink, but not the permission denied ones, then you'd probably have to take a flying guess that you don't have many files called 'permission denied' and try: find. This hides not just the Permission denied errors, of course, but all error messages. Note also that this technique requires that your login shell be bash (the default on Mac OS X and most Linux distributions).Use: find. Also note that the hash bang (#!) line needs to be the first line of the file (if it doesn't already exist). Here the tilde (~) character is being used as a shortcut for /Users/oliver. bash_profile file in your home directory and adding the lines: #!/bin/sh This can be does easily by either creating or editing the existing. For example, if you have a "bin" directory in your home directory for regularly used shell scripts of other programs it may be wise to alter your executable search path. If you are commonly putting programs in a place on your hard disk that you wish to run without having to qualify their names. To determine which directory you are currently in use the pwd command. The current directory you are in is the period character followed by a slash. Similarly if I am in the same directory as MyProgram I need to use a "current directory" relative path. Or say I was in the directory /Users/oliver/MyProject2 and I wanted to execute /Users/oliver/MyProject/MyProgram I can use a relative path like this, to execute it: For example, if MyProgram was in the directory /Users/oliver/MyProject I and I was in my home directory I can qualify the executable name like this, and have it execute: If you are in a location that is near the program you wished to execute you can qualify the name with a partial path. So say I had an executable called MyProgram in my home directory on Mac OS X I can fully qualify it like so: To run any other command that is not in the executable search path requires that you qualify the path to the executable. 
This runs /bin/cat and displays mytextfile.txt to the terminal. So any executable in the listed directories can by run just by typing in their name.
TERMINAL FIND FILE MAC AND OPEN UNIX COMMAND MAC OS X
On Mac OS X (by default) this will display the following colon separated search path: You can display this path in the terminal with this command: All application execution in a Unix (Linux, Mac OS X, AIX, etc.) environment depends on the executable search path.
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