This is how i rename files with space to have underscores instead. DO NOT blame me if this commando erases all your files I found several examples how to do this when googling but they all failed. Some of them did nothing and some erased half my filenames. SO IF YOU USE THIS, PLEASE TRY IT IN A FOLDER WITHOUT IMPORTANT FILES FIRST.

Cheers!

If you are like me and are spending most of your time in Terminal.app you understand how annoying this is/was.

I tried to rename .profile, .inputrc and evey other startup script I had in my home folder but the problem did not go away.

Then I found an OSX user which had his Terminal crash when started. He solved his problem by cleaning up some OSX systemlogs. So I thought I try the same trick.

The logfiles which he removed where the asl files under /private/var/log/asl/

I read about them here: http://macosx.com/tech-support/can-i-deleteasl-log/24223.html

But I figured I’d just remove them all

When all asl files where removed my Terminal went back to normal again and I am sooooooo relieved.

This worked for me BUT I do not recommend you to remove anything if you do not know what you are doing!!!

Cheers!

Using pwgen out-of-the-box

I use pwgen (http://sourceforge.net/projects/pwgen/) to generate my passwords. pwgen can be downloaded from sourceforge or installed from MacPorts.

I used to have an alias that looked something like this

This command will generate a screen of passwords and I the use the mouse to double click on some random password. This have been great but requires me to move my hand to the mouse which is time consuming.

Getting rid of the mouse

So to get rid of the mouse I have created this alias which generates one password and the copies the password to the clipboard.

So my workflow becomes something like shift focus to Terminal with ⌘ + Tab and then create a new window with ⌘ + N.
Write pwgen and then close the window with ⌘ + W and then I am back where I started with a fresh password in my clipboard.

Cheers!

The hosts froze randomly (Even the console in vmware froze). Especially when putting a little load on the machines. After hours of testing we found that removing virtual CPU’s from the host solved the problem. More that one CPU got the machine to freeze after some time.

!! Unsatisfied solution !! So after a couple of more hours we found a working solution….

The solution was to disable the time stamp counter hardware in the host. This is done by passing notsc on the kernel command line. 

We found people running Ubuntu with a similar problem and some of them solved the problem with passing clocksource=acpi_pm on the kernel command line. The clocksource problem is known by VMware and more information can be found here http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1007020. This did however not solved our problem but some readers may find it helpful. 

Cheers!

More information can be found on the keyFinder page under my projects.

Cheers!

I dare to say that almost any sysadmin have locked himself out when playing with firewall rules… .

This is a simple tip on how to prevent that from happening when working with IPF.

This is how i do it.

First make your changes to your firewall configuration. Lets pretend we have them stored in /etc/ipf.conf.

The goal is to load the new updated configuration in a inactive list and then make that list active.

When the new rules are active we can sleep for a certain amount of time and then automatically switch back to the old rules. This is because if we make an error in the configuration so we get kicked out or any other unpleasant surprises we automatically restore the old state without having to jump into the car and drive to our datacenter.

This is the command we use to load the rules to the inactive list and then make that list active.

What does all these parameters mean?

• -I Set the list to make changes to the inactive list.
• -Fa This option specifies which filter list to flush. (“a” remove all filter rules).
• -f This option specifies which files ipf should use to get input from for modifying the packet filter rule lists.
• -s Swap the active filter list in use to be the “other” one.

This is a real lifesaver. If you are not using IPF find a way to replicate this on your own firewall/os.

Happy firewalling!