How to Enable VSFTP on Redhat Enterprise Linux 4 update 3:

To lock users in home dir:
Touch vsftpd.chroot_list ; to create file of users that are allowed to ftp outside their home dirs add root to this file
Cd /etc/vsftpd vi vsftpd.conf

# You may specify an explicit list of local users to chroot() to their home 
# directory. If chroot_local_user is YES, then this list becomes a list of 
# users to NOT chroot(). 
chroot_list_enable=YES chroot_local_user=YES

# (default follows)
chroot_list_file=/etc/vsftpd.chroot_list ; add root to this file service vsftpd restart
To lock users in home dir:
Touch vsftpd.chroot_list ; to create file of users that are allowed to ftp outside their home dirs add root to this file
 

How to stop/start network ethernet interface:

[root@ice ~]# ifdown eth0

[root@ice ~]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:2A:47:7F

inet addr:192.168.0.103 Bcast:192.168.0.255 Mask:255.255.255.0 BROADCAST MULTICAST MTU:1500 Metric:1

RX packets:1899 errors:0 dropped:0 overruns:0 frame:0 TX packets:833 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000

RX bytes:923925 (902.2 KiB) TX bytes:283867 (277.2 KiB) Interrupt:10 Base address:0x1400

[root@ice ~]# ifup eth0

Determining IP information for eth0... done. [root@ice ~]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:2A:47:7F

inet addr:192.168.0.103 Bcast:192.168.0.255 Mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fe2a:477f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1900 errors:0 dropped:0 overruns:0 frame:0 TX packets:838 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000

RX bytes:924267 (902.6 KiB) TX bytes:284517 (277.8 KiB) Interrupt:10 Base address:0x1400
 

How to Create and Mount filesystem in redhat enterprise Linux:

Redhat Enterprise 4 Linux you can use fdisk -l to list existing partitions on your system as a part of your Lab in RH133 Course : 

[root@ice ~]# fdisk -l /dev/sda

Disk /dev/sda: 21.4 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 83 Linux /dev/sda2 14 1318 10482412+ 8e Linux LVM

/dev/sda3 1319 1579 2096482+ 82 Linux swap /dev/sda4 1580 2610 8281507+ 5 Extended

Here we have unallocated extended partition. Remember you can have only 3 Primary partitions for a single disk in Redhat in our case we have SCSI disk /dev/sda where we have 3 primary partitions,with remaining unlloacted space you need to create Extended partition if you need to create more than 3 partitions . 

#fdisk /dev/sda

ON COMMAND TYPE n to create new partition , hit enter for start cylinder number and then on last cyliner i used +1024M you can use +1G as well , because I am going to create 1 GB filesystem : 

Command (m for help): n

First cylinder (1580-2610, default 1580): Using default value 1580

Last cylinder or +size or +sizeM or +sizeK (1580-2610, default 2610): +1024M

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.

The kernel still uses the old table.

The new table will be used at the next reboot. Syncing disks.

Here is a catch that would be really stupid idea to reboot your Redhat enterprise Linux server to activate your partition table changes. I am sure Redhat will remove this warning in their upcoming redhat enterprise level 5 Linux version.  Also you can save time in your RHCT/RHCE Certification Exam using partprobe. Note this how I am activating new partition table changes using PARTPROBE magic command.

[root@ice ~]# partprobe

[root@ice ~]# fdisk -l /dev/sda

Disk /dev/sda: 21.4 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 83 Linux /dev/sda2 14 1318 10482412+ 8e Linux LVM

/dev/sda3 1319 1579 2096482+ 82 Linux swap /dev/sda4 1580 2610 8281507+ 5 Extended /dev/sda5 1580 1704 1004031 83 Linux

Now I have to create a directory where I need to mount new +1 GB fileystem I am going to make ext3 filesystem . 

#mkdir /home

[root@ice ~]# mkfs -t ext3 /dev/sda5 [root@ice ~]# mount /dev/sda5 /home [root@ice ~]# df -h /home

Filesystem Size Used Avail Use% Mounted on /dev/sda5 966M 18M 899M 2% /home

Here is your +1GB home filesystem (type is ext3) ready to use. You can add this in yout /etc/fstab file to make change permanent where it will mount /home automatically and persistent to server reboots.

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