ASA static/Default Routing configuration

Syntax of static route configuration is :
Route <interface-name> <ip address> <netmask> <gateway ip> [distance]
Objects:

• Configure static routing to inside interface

ASA1(config)#route inside 172.30.10.0 255.255.255.0 172.30.30.2 1
ASA1(config)#route inside 172.30.20.0 255.255.255.0 172.30.30.2 1

• Configure default route to internet

ASA1(config)#route outside 0.0.0.0 0.0.0.0 192.168.1.2

Note: we can use the command “route outside 0 0 192.168.1.2” for default route, both are same.

Network Time Protocol (NTP) configuration

One time update

If you want to synchronize with NTP server just now, then execute the following command:

$ sudo ntpdate 1.in.pool.ntp.org

Here 1.in.pool.ntp.org is the NTP server we are synchronizing with. You can find closer NTP server to your country from www.pool.ntp.org

NTP automatic synchronization through service

$ sudo apt-get install ntp

$ sudo service ntp start

If you want to synchronize with more closer NTP servers, then edit ntp.conf file by replacing the existing NTP servers with closer servers.

$ sudo nano /etc/ntp.conf

now change ntp servers if you want and save the file and restart the service

$ sudo service ntp restart

NOTE: if you are running other distributions than Ubuntu, then login as root and run the command without “sudo” in front of it

automatic login Ubuntu 11.10

sudo nano /etc/lightdm/lightdm.conf

now under [SeatDefaults], add the following

autologin-user=binoy

Note: here username is “binoy” . change it to your user name

Linux/Unix file system Hierarchy

/	root directory
/bin	command binaries
/boot	boot loader
/dev	devices
/etc	configuration files
/home	user home directories (MacOSX uses ‘USERS’ directory to store home directories of users)
/lib	library files for executables
/proc	virtual file system (information about current running system)
/root	root user home directory
/sbin	system binaries (binaries that should run by system not users)
/tmp	temporary file storage
/usr	user binaries , often read only; (install by user like open office)
/var	variable files, log, mail
/media	mount place for removable media
/mnt	legacy location for removable media

createrepo rpm installation problem – solution

Error:

[root@server1 Packages]# rpm -ivh createrepo-0.9.8-4.el6.noarch.rpm
warning: createrepo-0.9.8-4.el6.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY
error: Failed dependencies:
    deltarpm is needed by createrepo-0.9.8-4.el6.noarch
    python-deltarpm is needed by createrepo-0.9.8-4.el6.noarch

Solution:

rpm -ivh createrepo-0.9.8-4.el6.noarch.rpm deltarpm* python-deltarpm*