WattMaster WM-WCC3-TGD-01B - Manual (Page 652)

WCC III Technical Guide 13B-40
13B. WCC III - MCD INSTALLATION GUIDE
Common Linux Commands
Common Linux Commands that would be helpful to know for the WCCIII-MCD2
Display Current Confi g for all NIC’s: ifconfi g
Display Current Confi g for eth0: ifconfi g eth0
Display Current Confi g for eth1: ifconfi g eth1
Assign IP: ifconfi g eth0 192.168.100.100
Ping: ping -c 4 192.168.100.100
Assign second IP: ifconfi g eth1 192.168.200.200 - Used for Crossover connection
Disable network card: ifconfi g eth0 down - WARNING: Use this command only if connected through a serial port or if you have
Keyboard and Monitor hooked up.
Enable network card: ifconfi g eth0 up
Assign IP/Subnet: ifconfi g eth0 192.168.100.100 netmask 255.255.255.0
Assign Default Gateway: route add default gw 192.168.100.1
Trace Path: tracepath www.google.com - Tests if route to Internet is present
DNS Test: host www.google.com - Tests if the MCD’s DNS Settings are functioning /etc/resolv.conf
Reverse Lookup: host 209.191.93.52 - Tests reverse DNS lookup to yahoo.com
Ping XXX.XXX.XXX.XXX Pings a specifi c IP Address for testing. Under Linux it is continually testing the IP address so you
must press “Control” “C” to stop the IP pinging process.
traceroute “IP address” Provides information concerning the route which packets must take to get from your computer (the server in
this case) to a remote computer/server; typically used to diagnose possible problems in packet routing.
nslookup “IP address” Provides conversion of an IP address to an alias of a computer if it is registered in DNS (Domain Name
Service) or will provide the IP address for an alias.
sudo sudo is the superuser and as such is a privileged user who has unrestricted access to the whole system,
including all commands and all fi les regardless of their permissions. By convention, the username for the
superuser account is root.
ls (ls –al is the most useful) Lists the contents of a directory by typing on the command line. -l displays detailed information
about each fi le and directory, including permissions, owners, size and time/date when the fi le was
last modifi ed; -a option displays all the fi les and subdirectories including hidden fi les (with names
that begin with a dot); -p displays a slash at the end of each directory name to distinguish them
from fi lenames; -r displays fi les in reverse order; -t displays fi les in order of modifi cation time; -x
displays the fi lenames in columns across the screen.
chmod (permissions) fi lenames changes the permissions for a fi le; permissions should include a letter designating who gets
permissions (u for the user, g for the group, o for others, or a for all) followed by a + or - (to give or
take away the permission) followed by the kind of permission (r for read access, w for write
access, x for execute if the fi le is a program or script); the complete command that you type should
look like: chmod g-w fi lename
chown user:group fi lenames changes ownership of a fi le