Ater TL upgrade still oslevel is showing the older version ??

Well , this is a known issue . This is just because you have some missing file system .

suppose you were in TL 09  and upgraded to TL10  but still oslevel is showing TL09 .
Then Run below command to get the missing file set details .

oslevel -rl 5300-10


The above will show you the details about the missing file sets . Now install the file sets . and after that check the os version . that shouls show  TL10 .  

How to know the status of LPAR from HMC command line ::

run below command as hscroot in from HMC command line --

lssyscfg -r lpar -m <managesystem> --all

for specific LPAR


lssyscfg -r lpar -m <managesystem> -n <LPARNAME>

how to reset LPAR from HMC command line ::

Run below command as hscroot  in HMC   --


chsysstate -m <manage-system> -r lpar -n <Lpar-name> -o reset

The best way to sync between two directories in any Unix ...

use below command    ---

go to source dir . and run below command

cd /<source-dir>
find . -print | cpio -pmvd /dest-dir   


The above will have the work done for you :)