How to clear terminal command history?

Is it possible to clear the previous commands in terminal (up arrow key cycles through every entered line)?

Hi, blankets.
You wrote: "Is it possible to clear the previous commands in terminal (up arrow key cycles through every entered line)?"Yes. At the terminal prompt, type
history -c
and press Return.
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X

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I'd try a reboot just to see if it fixes the issue.
Try a reboot (described below).
Think of it this way, the iPhone is more of a computer than a phone. It suffers from being a new OS and nobody can deny there are not bugs and memory leaks. The longer left running, the more things start to fail or slow down (I have had the iPhone since day one of original phone and I am just speaking from my experience). Thus I equate it to like when Windows95 came out...not sure of your age or if you remember those days...but back then it was a running joke of how many days you can keep Windows 95 running before you had to reboot. I am sorry to say but the iPhone is the same way right now (but getting better with a few hiccups back during the 2.0 release). So for me, I reboot daily when I leave in the morning and take it off the charger. By doing so I rarely see any lag or problems.
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Frank,
Your response was helpful, but I realized after looking at my .bash_history file that only the commands entered are listed, not the output. I would like my commands to be printed out, but also the result from the commands (in this simple example, the directory listing):
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There are instructions at the bottom of the page you linked to that tell you how to undo it.
Editing the .bash_history file only removes commands from the recorded history, it doesn't undo them. Although doing that isn't going to cause any problems, it does reveal a tendency to fiddle with "arcane knowledge" without fully understanding it. That's very, very bad, as doing the wrong thing in the Terminal could easily cause irreversible damage to the system that can only be fixed by reinstalling. It could even lead to data loss.

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I'd try a reboot just to see if it fixes the issue.
Try a reboot (described below).
Think of it this way, the iPhone is more of a computer than a phone. It suffers from being a new OS and nobody can deny there are not bugs and memory leaks. The longer left running, the more things start to fail or slow down (I have had the iPhone since day one of original phone and I am just speaking from my experience). Thus I equate it to like when Windows95 came out...not sure of your age or if you remember those days...but back then it was a running joke of how many days you can keep Windows 95 running before you had to reboot. I am sorry to say but the iPhone is the same way right now (but getting better with a few hiccups back during the 2.0 release). So for me, I reboot daily when I leave in the morning and take it off the charger. By doing so I rarely see any lag or problems.
A reset/reboot is:
Go to Home Screen
Press and Hold Home Button
Keep holding and press and hold Lock Button
Keep holding Both
You will see Slide to Turn Off (Don't let go to slide, just keep holding)
The phone will turn off (in time, but screen will look like it has some white lines)
Keep Holding
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Turning off via the Slide to Turn off while good and fine to turn off, is more like the Sleep Mode on a computer. Thus any locked up issues in memory remain when you turn back on. A reboot as described is like doing a real Turn off and Turn On on a computer.
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Screenshots in Pictures library. When you create several screenshots using this method, the files are automatically numbered consecutively, which is as shown below:
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be still named as Screenshot (4), which is as shown below:
Solution
To resolve this problem, you can use the method below:
Press Windows logo key +R to open Run, type
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If only deleting part of the screenshots, please refer to the following two scenarios (still using the above example)
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Only deleting Screenshot (2), the next capture would be named as Screenshot (2), and the following ones would be named as Screenshot (4), Screenshot (5) and so on.
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Applies to
Windows 8
Windows 8.1
Please click to vote if the post helps you. This can be beneficial to other community members reading the thread.

I need to clear the history of uiwebview,
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[http://discussions.apple.com/message.jspa?messageID=7353715#7353715]
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[Mac OS X: Starting up in Safe Mode|http://docs.info.apple.com/article.html?artnum=107393]
[What is Safe Boot, Safe Mode? (Mac OS X)|http://docs.info.apple.com/article.html?artnum=107392]
[Safe Boot takes longer than normal startup|http://docs.info.apple.com/article.html?artnum=107394]
[Mac OS X 10.4, 10.5- Computer shuts down during Safe Boot|http://support.apple.com/kb/TA24054]

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How to clear terminal command history?

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