I did some partition size expansions of my centOs system and recover boot loader and file system successfully.I also changed the location and expanded the swap (5GB to 8GB) partition along with above deeds. Now the file system looks like this.  The problem is swap doesn't show it's full size. (look at the red circle. thought the used space is 0, unused space is still 5GB ). I want to fix this.Here is the result of free -m[root@localhost ~]# free -m             total       used       free     shared    buffers     cachedMem:          3711        700       3010          0         71        298-/+ buffers/cache:        330       3380Swap:         4999          0       4999Here is the uuid of swap/dev/sda7: UUID=52485c83-3929-4f5b-bd1c-60492ebd1e5c TYPE=swapwill the command mkswap -U 52485c83-3929-4f5b-bd1c-60492ebd1e5c help me here. Else what must I do? 
Expand the size of swap partition
swap
Disable the swap with swapoff /dev/sda7Re-initialize the swap partition to use its full size: mkswap /dev/sda7Re-enable the swap: swapon /dev/sda7Note that mkswap generates a new partition UUID when run. This can prevent the new swap partition from being used normally, if it is referenced by UUID in /etc/fstab or elsewhere. If you want to keep the original UUID for your swap partition, you can specify that in step 2:mkswap -U 52485c83-3929-4f5b-bd1c-60492ebd1e5c /dev/sda7