Red Hat NETSCAPE MANAGEMENT SYSTEM 6.0 - COMMAND-LINE Instrukcja Użytkownika Pobierz pdf (Strona 44)

can get GUI-based Ktop from "K"menu under "System"-"Task Manager" (or by executing

"ktop" in an X-terminal).

uname -a

(= Unix name with option "all") Info on your (local) server. I can also use guname (in X-window

terminal) to display the info more nicely.

free

Memory info (in kilobytes).

df -h

(=disk free) Print disk info about all the filesystems (in human-readable form)

du / -bh | more

(=disk usage) Print detailed disk usage for each subdirectory starting at the "/" (root) directory

(in human legible form).

cat /proc/cpuinfo

Cpu info--it show the content of the file cpuinfo. Note that the files in the /proc directory are

not real files--they are hooks to look at information available to the kernel.

cat /proc/interrupts

List the interrupts in use.

cat /proc/version

Linux version and other info

cat /proc/filesystems

Show the types of filesystems currently in use.

cat /etc/printcap

Show the setup of printers.

lsmod

(As root. Use /sbin/lsmod to execute this command when you are a non-root user.) Show the

kernel modules currently loaded.

set|more

Show the current user environment.

echo $PATH

Show the content of the environment variable "PATH". This command can be used to show

other environment variables as well. Use "set" to see the full environment.

dmesg | less

Print kernel messages (the content of the so-called kernel ring buffer). Press "q" to quit "less".

Use

less /var/log/dmesg to see what "dmesg" dumped into this file right after the last system

bootup.

7.3 Basic operations

any_command --help |more

Display a brief help on a command (works with most commands). "--help" works similar to DOS

"/h" switch. The "more" pipe is needed if the output is longer than one screen.

man topic

Display the contents of the system manual pages (help) on the topic. Try man man first. Press "q"

to quit the viewer. The command info topic works similar and may contain more up-to-date

information. Manual pages can be hard to read. Try any_command --help for short, easy to

digest help on a command. If more info needed, have a look to the directory

/usr/doc. To

display manual page from a specific section, I may use something like in this example: man 3

exit

(this displays an info on the command exit from section 3 of the manual pages).

apropos topic

Give me the list of the commands that have something to to do with my topic.

help command

Display brief info on a bash (shell) build-in command.

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