I am coming across a problem with my disc space, but when I try to resize or merge my partitions I cannot. I've tried many solutions like using GParted to resize or merge, but it is locked and I do not have a CD to do another action.
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P.S: I am not using dual boot or windows.
Your partition is already maximum size at 160 GB. There is still 136 GB free, so it is difficult to understand why you have a problem with your disk space. If you have a problem with your disk space, then you will need to buy additional storage to store your data.
On the fact that it is locked: obviously, you cannot resize a partition while it is in use. To resize partitions, you either work from a live session started using an installation DVD or USB, or you use the command line tools in a recovery prompt. If you do not have a CD to do another action, then your only option will be the command line. See apropos partition for a list of command line tools to deal with partitions.
