Setup SVN on CentOS

http://wiki.centos.org/HowTos/Subversion

VMware: Increase disk space of Linux VM

Increase disk space to desired size using the VM Client.

Login to the VM and restart the machine (init 6)

After restart go to fdisk (fisk /dev/sda or /dev/hda etc.)

Create new partition using fdisk, save and exit.

If an LVM is used then the newly created partition will be needed to added the the LVM.

Follow instructions below. Assume new partition is /dev/sda3 (4GB), volume group is VolGroup-00 and Logical volume is LogVol-100

pvcreate /dev/sda3

vgextend VolGroup00 /dev/sda3

lvextend -L +4G /dev/mapper/VolGroup00-LogVol00

resize2fs /dev/mapper/VolGroup00-LogVol00

Set umask for a specific directory

Use the setfacl command. Examples below from man.

EXAMPLES

Granting an additional user read access

setfacl -m u:lisa:r file

Revoking write access from all groups and all named users (using the effective rights mask)

setfacl -m m::rx file

Removing a named group entry from a file’s ACL

setfacl -x g:staff file

Copying the ACL of one file to another

getfacl file1 | setfacl --set-file=- file2

Copying the access ACL into the Default ACL

getfacl --access dir | setfacl -d -M- dir

Found solution here

http://www.linuxforums.org/forum/slackware-linux/156119-solved-umask-specific-directory.html

Java File Upload with Servlet 3.0

Found it here

Recover GRUB menu after Ubuntu 9.10 update

A couple the GRUB menu got screwed up after an update. The recover process can be found here. But I had to take a couple additional steps to fix my GRUB.

1. Figure what your where your /boot and /root partition is installed in. My /boot was /dev/sdc2 and /root was /dev/sdc3.
2. Mount /root to /mnt using sudo mount /dev/sdc3 /mnt
3. Mount /boot to /mnt/boot using
   mount /dev/sdc2 /mnt/boot.
   NOTE: If both /root and /boot are on the same partition then you only have to mount the /root partition.
4. Check /mnt/boot/grub/device.map for an entry for /dev/sdc.
5. If /dev/sdc does not exist, then add it using vi. For example, the entries in mine were
   (hd0) /dev/sda
   (hd1) /dev/sdb
   So I added (hd2) /dev/sdc to list.
6. If this was not added to the list, the /root partition will not be found and the grub recovery will fail.
7. Next re-install the grub by executing
   sudo grub-install --root-directory=/mnt /dev/sdc
   
8. Reboot
9. Refresh the GRUB 2 menu by executing update-grub2

CentOS static routes

Temporary Static Route

Use the route command to add a static route.

route add -host 192.168.1.2 gw 192.168.50.254 dev eth0:0 (eth0:0 is virtual interface)

Permanent Static Route

echo "192.168.1.2/32 via 192.168.50.254" >> /etc/sysconfig/network-scripts/eth0:0

In both the cases above all requests to 192.168.1.2 will be routed via gateway 192.168.50.254 and device eth0:0

Install/Uninstall GlassFish on Linux

Uninstalling Glassfish V2 and installing Glassfish V3

Glassfish can be installed with the file-based installer or the JAR-based installer.
Uninstall instructions from SUN
Installtion instruction from SUN

Installing Glassfish

File-based

1. Download the file from
   
2. chmod +x sges-glassfish-v3-unix.sh
3. Create the installation directory: mkdir /usr/glassfish
4. Navigate to where sges-glassfish-v3-unix.sh file exists.
5. Run ./sges-glassfish-v3-unix.sh
6. Follow the instructions.
   

ZIP file installtion

1. Download the file from
   
2. Create the installation directory: mkdir /usr/glassfish
3. Unzip contents to installation directory: unzip sges-v3-unix.zip

JAR-based

Uninstalling Glassfish

File-based

1. Navigate to your Enterprise Server installation directory.

2. Invoke the uninstallation program as follows:

   • To use the uninstallation in GUI mode, type:

     ./uninstall

   • To use the uninstallation in command-line mode, type:

     ./uninstall -console

JAR-based and Zip

1. Change to the directory containing the glassfish directory.

2. Run the following command: rm —r glassfish.