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What is linux

how to Start and stop vsftpd

 The vsftpd RPM installs the /etc/rc.d/init.d/vsftpd script, which can be accessed using the /sbin/service command.

To start the server, as root type:

/sbin/service vsftpd start

To stop the server, as root type:

/sbin/service vsftpd stop

The restart option is a shorthand way of stopping and then starting vsftpd. This is the most efficient way to make...

 

how to test the status of vsftpd

 You can always test whether the VSFTPD process is running by using the netstat -a command, which lists all the TCP and UDP ports on which the server is listening for traffic. This example shows the expected output:

 

[linux@hc ~]$ netstat -a | grep ftp

tcp        0      0 *:ftp                       *:*                         LISTEN 

 

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How do I configure an SNMP server on Linux

 First, install the required packages:

* net-snmp (this provides the snmp server)

* net-snmp-utils (this provides tools like snmp-walk)

 

To configure an SNMP server, community strings need to be defined. This is done in the following configuration file:

 

/etc/snmp/snmpd.conf

 

The version of the configuration file that comes with SNMP is quite complicated. A simpler version will suffice for the setup discussed in this article.

 

Before proceeding further, make a backup of...

 

ubuntu 9.10 download

 Alternate install CD

The alternate install CD allows you to perform certain specialist installations of Ubuntu. It provides for the following situations: setting up automated deployments; upgrading from older installations without network access; LVM and/or RAID partitioning; installs on systems with less than about 256MB of RAM (although note that low-memory systems may not be able to run a full desktop environment reasonably).

In the event that you encounter a bug using the...

 

How To Get Vsftpd Started

 With Fedora, Redhat, Ubunbtu and Debian You can start, stop, or restart VSFTPD after booting by using these commands:

[root@bigboy tmp]# /etc/init.d/vsftpd start[root@bigboy tmp]# /etc/init.d/vsftpd stop[root@bigboy tmp]# /etc/init.d/vsftpd restart

With Redhat / Fedora you can configure VSFTPD to start at boot you can use the chkconfig command.

[root@bigboy tmp]# chkconfig vsftpd on

With Ubuntu / Debian the sysv-rc-conf command can be used like this:

root@u-bigboy:/tmp# sysv-rc-conf...

 

How to Display current active Internet connections

 Display current active Internet connections

 

[root@localhost ~]# netstat -nat

Active Internet connections (servers and established)

Proto Recv-Q Send-Q Local Address               Foreign Address             State      

tcp        0      0 0.0.0.0:199                 0.0.0.0:*                   LISTEN      

tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      

tcp        0...

 

how to display open ports in linux

 Display open ports

 





[root@localhost ~]# sudo netstat -tulp

 

Active Internet connections (only servers)

Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   

tcp        0      0 *:smux                      *:*                         LISTEN      10218/snmpd         

tcp        0      0 *:mysql                     *:*                      ...

 

how to display the routing table in linux

 Display the routing table

 [root@localhost ~]# route -n

 

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
172.16.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 172.16.0.254 0.0.0.0 UG 0 0 0 eth0


[root@localhost ~]# /sbin/route
Kernel IP routing table
Destination Gateway...

 

How to Change IP address and netmask from command line

 Activate network interface eth0 with a new IP (172.168.10.50) / netmask:
$ sudo ifconfig eth0 172.168.10.50 netmask 255.255.255.0 up

 

How to display network interface information on linux

 Display network interface information

$ ifconfig

[root@localhost ~]# ifconfigeth0      Link encap:Ethernet  HWaddr 00:0C:29:17:E0:2C            inet addr:172.16.0.203  Bcast:172.16.0.255  Mask:255.255.255.0          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          RX packets:679219 errors:0 dropped:0 overruns:0 frame:0          TX packets:262977 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:1000         ...

 
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