Running out of disk space on my root partition was a bit scary yesterday. “Matt, how did you fill up a 20GB partition in a month’s time??”
After a little searching I found a Debian package for NCDU, a handy disk space visualization tool that runs from the command line.
A simple
ncdu /
scans the file system.
The results are pretty simple to decipher. Simply navigate using the up, down, and enter keys to find the largest files on the system (that hopefully aren’t system files, but some large log or cache files). In my case it was a 17GB ISO that was in OwnCloud’s “trash” folder, but never got deleted.
Trying to get on a client’s VPN today via the Cisco AnyConnect VPN software presented a problem this morning. The process for connecting would freeze on “Hostscan is waiting for the next scan”. After some quick googling I found that the client (my laptop) was possibly attempting to send all of the personal SSL cerficiates the client currently has to the server for inspection(?).
Fiddler creates dozens of certificates when intercepting web traffic during debugging. Since Fiddler uses a man in the middle attack to intercept HTTPS traffic, it has to create certificates for each site you browse. After a few hours of developing (and having other browsers on your computer open), these certificates can clog up the pipe to the VPN server when the client tries to send all of them. Another possible reason is the Cisco VPN server isn’t liking the self signed certificates but doesn’t know how to fail gracefully.
Opening up certmgr.msc and clearing out all of the Certificates > Personal > Certificates allowed me to connect again.
This isn’t a perfect/permanent fix, but hopefully it’ll help!
