Need help with understanding Console code

If that's true, something is wrong with your system.

What's the output of this:

ls -@Oaen $TMPDIR.. | open -f -a TextEdit

Back up all data to at least two different storage devices.

Boot into Recovery mode, launch Disk Utility, and erase the startup volume. This operation will destroy all data on the volume, so you had be better be sure of your backups. Quit Disk Utility and install OS X. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade, so make a note of those before you begin.

When you reboot, you'll be prompted to go through the initial setup process. That’s when you transfer the data from one of your backups. For a walkthrough, see here:

Using Setup Assistant

Don't transfer the Guest account, if it was enabled on the old system.

I'm making the recommendation because the only theory I can think of that fits the facts you've stated is that there's a corrupt sector on your boot volume. Erasing it and restoring the data would most likely fix that, unless the drive is on the verge of total failure (which it might be.)

It's also possible that I'm completely wrong and that the suggested action will be a waste of time.

A failing drive can be simulated by a failing SATA cable or logic board. SMART might tell you whether you have bad sectors, but you'd have to do an extended self-test.

I don't have any other suggestions.

when a drive has a Bad Block, the drive controller knows this, and marks that Block for replacement with a spare from the spares pool. It makes a note of that and sometimes reflects that in the SMART Status, but often not until several blocks are Bad.

A Bad Block cannot be replaced until new data are available to be written to that Block. If the Block is still bad after re-write with new data, the drive controller will substitute a nearby replacement block, and make a permanent substitution for that block number.

So Linc Davis' suggestion of erasing and re-Installing Mac OS X and your data will cause it to have all good blocks by the time you are done, unless the drive has many Bad Blocks. And the image of Mac OS X will be a clean one.

A technician in a professional situation is likley to simply replace the drive with a new one and do that same re-install and a restore -- exactly what you would do minus the new drive. He does not have time for a surface scan for Bad Blocks, which takes hours and is often inconclusive.

This is not necessarily superior. He cannot take the risk of spending hours on this problem only to find the drive must be replaced anyway. So the "Pro" in this situation is almost forced to take the more extreme course of action, because it is guaranteed to work.

He may hand you back the old drive and suggest you erase it and use it for backups, as it is not dead, it is just four hours end-to-end to check, and four more to re-write.