Chapter 5. Additional Topics 61
last who has logged into Linux?
w who is logged into Linux now?
whoami displays your userid
ifconfig display current LAN adapter status
netstat -r display current routing state
route add default gw 9.12.17.150 eth0 create default gateway
route add -net 10.10.0.0 255.255.255.0 eth0 add network route
top monitor activity. “q” to quit
vmstat 10 5 5 activity reports. 10 seconds between reports.
mount /dev/cdrom /mnt/cdrom mount a CD-ROM
mount /dev/fd0 /mnt/floppy mount a diskette (but not a DOS diskette)
mount /dev/hdc2 /s391 mount file system on second HDD at mount point /s391
mount display the mount table
Multiple consoles, sessions, screens
Linux offers multiple consoles on the PC (or ThinkPad) display. The keys Ctrl-Alt-Fn are used
to select a console. Ctrl-Alt-F1 through Ctrl-Alt-F6 produce traditional UNIX-style command
lines, and Ctrl-Alt-F7 produces the X windows GUI desktop. Each of these consoles is a
separate Linux session, requiring a separate login. You can log in with different userids in
each session, or use the same userid in several sessions. You can switch between sessions
at any time, using Cnrt-Alt-Fn keys.
You can also have multiple command line windows open on the desktop. These do not
require separate logins.
Text editors
Traditional UNIX users and many Linux users regard vi as their primary text editor.
Traditional mainframe users often avoid vi, if possible. The kde desktop offers the Advanced
Editor, which can be started from the fountain pen nib icon in the toolbar. This is much like a
simple PC text editor and very unlike vi. It is suitable for almost all the text editing we
required while installing and customizing FLEX-ES. Anyone comfortable using any version of
Windows or OS/2 should have no trouble using this editor. The Red Hat Linux distribution
includes a number of editors, and you can select the ones you like best.
