Check and Change Permission File and Folder in fedora linux. Change Permission in Linux, Open Permission in Limux.

Check permission in Linux:

ls -l or ls -l Streamline-AdminApp

Change Permission in Linux :

chmod 755 Streamline-AdminApp

This string of letters, drwxrwxrwx, represents the permissions that are set for this folder. (Note that these are often called attributes by FTP programs.) Let's explain what each of these letters means:

d	r	w	x	r	w	x	r	w	x
	Owner			Group			Other
Directory	Read	Write	Execute	Read	Write	Execute	Read	Write	Execute

As you can see, the string of letters breaks down into 3 sections of 3 letters each, representing each of the types of users (the owner, members of the group, and everyone else). There is also a "d" attribute on the left, which tells us if this is a file or a directory (folder).

If any of these letters is replaced with a hyphen (-), it means that permission is notgranted. For example:

drwxr-xr-x

A folder which has read, write and execute permissions for the owner, but only read and execute permissions for the group and for other users.

-rw-rw-rw-

A file that can be read and written by anyone, but not executed at all.

-rw-r--r--

A file that can be read and written by the user, but only read by the group and everyone else.

Using numbers instead of letters

As we said earlier, you'll often be asked to do things using numbers, such as "set 755 permissions". What do those numbers mean?

Well, each of the three numbers corresponds to each of the three sections of letters we referred to earlier. In other words, the first number determines the owner permissions, the second number determines the group permissions, and the third number determines the other permissions.

Each number can have one of eight values ranging from 0 to 7. Each value corresponds to a certain setting of the read, write and execute permissions, as explained in this table:

Number	Read (R)	Write (W)	Execute (X)
0	No	No	No
1	No	No	Yes
2	No	Yes	No
3	No	Yes	Yes
4	Yes	No	No
5	Yes	No	Yes
6	Yes	Yes	No
7	Yes	Yes	Yes

So, for example:

777 is the same as rwxrwxrwx

755 is the same as rwxr-xr-x

666 is the same as rw-rw-rw-

744 is the same as rwxr--r-

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To increase Kernal Memory run the following command in Terminal. How to increase Kernel Memory

To increase Kernal Memory run the following command in Terminal:

> su
> "Type root password"
> echo 2147483648 > /proc/sys/kernel/shmmax
> sysctl -w kernel.shmmax=2147483648
> echo "kernel.shmmax=2147483648" >> /etc/sysctl.conf

If problem occur (service stop) in approval application when user approve a transaction. Then follow below two steps to correct that problem.

First step:

> sed -i 's/XINERAMA/FAKEEXTN/g' /usr/java/j2sdk1.4.2_18/jre/lib/i386/libawt.so 
> sed -i 's/XINERAMA/FAKEEXTN/g' /usr/java/j2sdk1.4.2_18/jre/lib/i386/libjawt.so
Note : In above tow comamnds I have given jre path for java 1.4.2 if you have higher version then path may differ.

Second step:   Add the following line in "/etc/init.d/Streamline_Approval" file as 1st line

export LIBXCB_ALLOW_SLOPPY_LOCK=1

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Replication Implementation pg-pool Installation for PostgreSQL Replication.

After Download the pgpool file copy the tar file to home location then  we need to extract that as following.

                            

tar ­xvf pgpool­II pgpool­II­2.3.3.tar.gz

   * After extracting the source tar ball, execute the configure script.

Configure

                              >su

                              > “type the root password”

                              >cd pgpool­II­2.2.3

                              >./configure

                              >make

                              >make install

      will install pgpool­II...

After Installation copy the pgpool.conf and pcp.conf files to

following location

                  /usr/local/etc/

     

Then create the new database like “replicatedb” in both Master and Slave servers:

#/usr/local/pgsql/bin/createdb ­p 9999 ­Ustreamline  replicatedb

Restore the database backup to the replicatedb:

#/usr/local/pgsql/bin/pg_restore ­p 9999 ­Ustreamline  ­v ­Fc ­d

replicatedb  /home/erpsupport/demo.Backup

              

Note: Database's names and their passwords should same in both master and

slave servers.

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Important Instructions For Replication using postgres (PGsql), java in fedora machine.

Here we are testing replication using streamline ERP system (One largest ERP system for Garments), Postgrea 8.2, Java , PGPool and Fedora 9. 

1.  Restarting  Streamline Services:

When you need to restart Streamline Services you should restart pgpool also.

Follow below setup to restart steamline services and pgpool

Step-1: Stop the Streamline Services
Step-2: Stop the pgpool
-->pgpool -m fast stop

Step-3: Start the pgpool
-->pgpool -n &
Step-4: Start the Streamline Services


2.  Restarting  pgpool:

When you need to restart the pgpool you should follow the same procedure.

Step-1: Stop the Streamline Services
Step-2: Stop the pgpool
-->pgpool -m fast stop
Step-3: Start the pgpool
-->pgpool -n &
Step-4: Start the Streamline Services



3.  Restarting Master Server:

If you need to Restart the Master server then do the following procedures
Step-1: Stop the Streamline Services
Step-2: Stop the pgpool
-->pgpool -m fast stop
Step-3: Stop the postgres service in Master server

--> su
-->
--> su postgres
--> /usr/local/pgsql/bin/pg_ctl -D /usr/local/pgsql/data/ -m fast stop

Step-4: Then Restart the Master Server Machine
Step-5: Then start pgostgres services in master and check slave postgres also running
Step-6: Start the pgpool
-->pgpool -n &
Step-7: And Start the Streamline Services

4.  Restarting Slave Server:
If you want to Restart the Slave server means do the following procedures
Step-1: Stop the Streamline Services
Step-2: Stop the pgpool in mainserver
-->pgpool -m fast stop
Step-3: Stop the postgres service in Slave server
--> su
-->
--> su postgres
--> /usr/local/pgsql/bin/pg_ctl -D /usr/local/pgsql/data/ -m fast stop
Step-4: Then Restart the Slave Server Machine
Step-5: Then start postgres services in slave and check master postgres also running
Step-6: Start the pgpool in mainserver
-->pgpool -n &
Step-7: And Start the Streamline Services

5.  If Slave server connection faild due to Network problem or Slave Machine Crashed.
*  Restart Streamline and Pgpool services in Mainserver.  So that reports will get data from Mainserver.
*  Once Slave Server ready follow below steps to enable replication.
Step-1: Stop the Streamline Services
Step-2: Stop the pgpool
-->pgpool -m fast stop
Step-3: Stop the postgres service in Slave server
--> su
-->
--> su postgres
--> /usr/local/pgsql/bin/pg_ctl -D /usr/local/pgsql/data/ -m fast stop

Step-4: Stop the postgres service in Master server
--> su
-->
--> su postgres
--> /usr/local/pgsql/bin/pg_ctl -D /usr/local/pgsql/data/ -m fast stop

Step-5: Delete the “data”  folder in slave server
--> su
-->
--> rm -rf  /usr/local/pgsql/data
Step-6: Then create the “data” folder in slave server
--> su
-->
--> mkdir  /usr/local/pgsql/data
--> chown postgres /usr/local/pgsql/data

Step-7: Copy the “data” folder from Master server to Slave server “data” folder through rsync.
--> su
-->
-->  rsync -r -v -d -p -o -g -l root@192.168.0.41:/usr/local/pgsql/data/ /usr/local/pgsql/data/

        “While using rsync to each and every time we need to enter the root    
password of Main server. “

Step-8: After Complete the “data” folder copy. Delete the folders from table-spacing drives in Slave server.
--> su
-->
--> rm -rf /d_op_doc/
--> rm -rf /d_planning/
--> rm -rf /d_edi_stores/

Step-9: Then Copy the each table-spacing folders from Master to Slave Machines
--> su
-->
-->rsync -r -v -d -p -o -g -l root@192.168.0.41:/d_op_doc// /d_op_doc
-->rsync -r -v -d -p -o -g -l root@192.168.0.41:/d_planning// /d_op_doc
-->rsync -r -v -d -p -o -g -l root@192.168.0.41:/d_edi_stores// /d_op_doc
Step-10: Start the postgres service in  Master server
Step-11: Start the postgres service in  slave server
Step-12: Start the pgpool
-->pgpool -n &
Step-13: Start the streamline Services.

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Level -001 Hacking, Satellite TV, Linux, Mobile, Video Editing, Bangla, Photography, Download, Tutorial, Graphic design, News, Webware, Web Design, Animation, Internet, Hardware, Help, Science and Technology

Hacking, Satellite TV, Linux, Mobile, Video Editing, Bangla, Photography, Download, Tutorial, Graphic design, News, Webware, Web Design, Animation, Internet, Hardware, Help, Science and Technology

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