How do I know what file system my linux machine is running?

[sneakyimp]

In the past -- especially on some windows desktops -- I have had real performance issues when I get a lot of files in a single directory. The OS would be very slow in listing such a directory (MUCH slower than would be justified by the 1000+ file names) and rendering html from said directory would be very slow due to long times to retrieve files.

I've heard that certain linux file system options can list literally millions of files in a single directory with no real performance problems. I was wondering how to find out what filesystem might be used for my disks/partitions and also perhaps a bit more info on the various linux file system options.

[sheephat]

Open the partition manager, what linux distro are you using?

[sneakyimp]

server:/home/mydomain/public# cat /proc/version
Linux version 2.6.8-2-386 ([e-mail]) (gcc version 3.3.5 (Debian 1:3.3.5-13)) #1 Tue Aug 16 12:46:35 UTC 2005

[jazz_snob]

df -T

Filesystem    Type   1K-blocks      Used Available Use% Mounted on
/dev/hda1     ext3     6728376   3627536   2759056  57% /
tmpfs        tmpfs      257936         0    257936   0% /lib/init/rw
udev         tmpfs       10240        56     10184   1% /dev
tmpfs        tmpfs      257936         0    257936   0% /dev/shm
/dev/hda5     ext3    31247152  21935384   7724472  74% /home

Of course, try info df or man df for more info, man.