Apache as Load Balancer for Weblogic Server

1. gzip -d httpd*.tar.gz
2. tar -xvf httpd*.tar
3. ./configure --prefix=/u01/apache --enable-module=so --enable-rule=SHARED_CORE
4. make
5. make install
6. copy mod_wl.so to $apache_home/modules
7. vi $apache_home/conf/httpd.conf

8. add line to httpd.conf
-------
LoadModule weblogic_module modules/mod_wl.so
-------
Include conf/weblogic.conf
9. create file weblogic.conf


SetHandler weblogic-handler
weblogicCluster 192.168.10.1:7002,192.168.10.2:7002


10. start httpd
$apache_home/bin/apachectl start
11. check apache running
ps -ef | grep httpd

Search largest directory or file size

Here is command to seach largest directory size or file size in linux

Go to directory that want to search, here i try with root directory

[root@localhost /]# pwd
/

Run below command to sarch as tree

du -a | sort -nr | head -10



[root@localhost /]# du -a | sort -nr | head
4895036 .
2534040 ./u01
2491840 ./u01/app
2491824 ./u01/app/Middleware
1974680 ./usr
1178384 ./usr/share
944184 ./u01/app/Middleware/wls1033_generic.jar
691292 ./u01/app/Middleware/wlserver_10.3
663968 ./u01/app/Middleware/wlserver_10.3/server
481796 ./u01/app/Middleware/wlserver_10.3/server/lib


Run below command to search parent directory only

du -sm * | sort -nr | head

[root@localhost /]# du -sm * | sort -nr | head

2475 u01
1929 usr
129 lib
109 etc
58 var
37 sbin
21 lib64
9 bin
7 boot
6 root

Make local yum repository

- run mount command to mount repo file :
ex: mount -t iso9660 -o loop /dev/hdc /u02
- go to yum repo directory
cd /etc/yum.repos.d
- make file local.repo in this directory
insert below script in local.repo
[localrepo]
name=My local repo
baseurl=file:///u02/Server
enabled=1
gpgcheck=0
#gpgkey=file:///path/to/you/RPM-GPG-KEY
- run df -h to check the repo file already mounted

Filesystem Size Used Avail Use% Mounted on
/dev/sda1 3.8G 1.8G 1.9G 50% /
tmpfs 494M 0 494M 0% /dev/shm
/dev/hdc 2.9G 2.9G 0 100% /u02

Extend swap space on linux

Actually, yes. You can supplement your swap partition with a swap file. It goes something like this:

First, create a large empty file:
Code:
sudo dd if=/dev/zero of=/swap_file bs=1M count=1000
Replace 1000 with the size of the swap file desired, in MB. You can also put the swap_file in a different location if desired.


Next, we'll secure the swapspace, so ordinary users cannot read the contents (potential security breach):
Code:
sudo chown root:root /swap_file
sudo chmod 600 /swap_file
Then, turn it into swap space:

Code:
sudo mkswap /swap_file
Next, turn it on:
Code:
sudo swapon /swap_file

To make it turn on at every bootup, open up /etc/fstab:
Code:
sudo gedit /etc/fstab
Add this line to the end of the file:
Code:
/swap_file none swap sw 0 0
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