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You can press Ctrl-D to quickly exit from a shell, or logout from alogin shell. -- Konstantinos Konstantinidis <kkonstan@duth.gr>

To see the MAC addresses of the NICs on your system, type ifconfig -a -- Dru <genesis@istar.ca>

You can disable tcsh's terminal beep if you `set nobeep'.

Ever wonder what those numbers after command names were, as in cat(1)? It'sthe section of the manual the man page is in. "man man" will tell you more. -- David Scheidt <dscheidt@tumbolia.com>

To save disk space in your home directory, compress files you rarelyuse with "gzip filename". -- Dru <genesis@istar.ca>

Do you wonder what a terminal program is doing at the moment? dd(1) does notshow any throughput? Hit "^T" (Control + t) to send SIGINFO to the processand see what it is doing. -- Lars Engels <lme@FreeBSD.org>

Do you want to do a binary upgrade of your running FreeBSD installation? Use freebsd-update(8).To install updates and patches for the running branch use# freebsd-update fetch installTo upgrade to a newer release use# freebsd-update upgrade -r ${name_of_release} -- Lars Engels <lme@FreeBSD.org>

The output of "zfs list" can be sorted by a specific column using -s. Tosort the datasets by the "used" column in ascending order, run this command:zfs list -s usedTo sort in descending order instead, use -S:zfs list -S used -- Benedict Reuschling <bcr@FreeBSD.org>

To clear the screen, use "clear". To re-display your screen buffer, pressthe scroll lock key and use your page up button. When you're finished,press the scroll lock key again to get your prompt back. -- Dru <genesis@istar.ca>

Need to leave your terminal for a few minutes and don't want to logout?Use "lock -p". When you return, use your password as the key to unlock theterminal. -- Dru <genesis@istar.ca>

To see the last time that you logged in, use lastlogin(8). -- Dru <genesis@istar.ca>

Need to do a search in a manpage or in a file you've sent to a pager? Use"/search_word". To repeat the same search, type "n" for next or "p" forprevious. -- Dru <genesis@istar.ca>

You can search for documentation on a keyword by typing apropos keyword

Any user that is a member of the wheel group can use "su -" to simulatea root login. You can add a user to the wheel group by editing /etc/group. -- Konstantinos Konstantinidis <kkonstan@duth.gr>

You can use /etc/make.conf to control the options used to compile softwareon this system. Example entries are in/usr/share/examples/etc/make.conf and in make.conf(5).For options that are set for building FreeBSD's kernel and its world, seesrc.conf(5).

To find out the hostname associated with an IP address, use drill -x IP_address -- Dru <genesis@istar.ca>

Want to strip UTF-8 BOM(Byte Order Mark) from given files? sed -e '1s/^\xef\xbb\xbf//' < bomfile > newfile

If you don't want to edit /etc/rc.conf directly, use sysrc(8) to add and remove entries.Use "sysrc name=value" to add an entry and "sysrc -x name" to delete an entry. -- Lars Engels <lme@FreeBSD.org>

Don't let your zpool fill up completely by creating a dataset withreservation.# zfs create -o refreservation=<5% of total pool space> <poolname>/reservedYou can always shrink the reserve if you need the space, but your pool willalways have space left this way. -- Benedict Reuschling <bcr@FreeBSD.org>

To see how much disk space is left on your UFS partitions, use df -h -- Dru <genesis@istar.ca>