MFJ MFJ-1270Pi, Инструкция по эксплуатации, Страница: 6 / 15

MFJ-1270Pi Raspberry Pi TNC Instruction & Technical Manual
WARNING
With great power comes great responsibility! Your Pi will quite happily erase itself
if you make mistakes with
sudo , undoing hours or days of work. If you are unsure of
a command, don’t run it! Always keep a backup just in case!
Figure 3: Terminal Window
Prefacing a command with sudo tells the OS that you want to run the command immediately
following as root. Root is the system administrator account on a Linux machine and has the
priveleges to do whatever it wants. Some advice regarding
sudo and root priveleges in case you are
unfamiliar with Linux: do not run commands with elevated priveleges for no reason. As the
warning box above explains, root and other superusers can do anything they want to the operating
system, up to and including breaking it! Always take a moment to think through commands before
running them, especially as root! Do you really need to run them as root? Can they be effective
with normal user priviledges? Pausing and thinking through things like this can prevent the
frustration of watching everything you spent the past few days building disappear behind a
blinking cursor forever (or at least until you work up the willpower to start again). Some functions
such as
raspi-config must be run as root simply due to their nature (they by design make
system-level changes), but never develop the habit of just running commands as root for no reason.
-3-