F5 terminal - help to run commands - disk space full

AaronJBthank you, i've just done this when logging in to the cli 

bash 

cd /var/log

ls

df -h

/dev/mapper/vg--db--vda-dat.log 2.9G 2.9G 0 100% /var/log

/dev/mapper/vg--db--vda-dat.share 15G 5.4G 8.5G 39%

i'm not seeing any.1 or .2gz files?

I have alot of other files as well. 

How can I delete or free up space from the ones listed above please?

I am new to F5 just picking it up now.

I also just did ls -al /var/log and i still cannot see  .1 or .2.gz files out of the big list output displayed.

i can see messages.1.gz and this has 0 in size.

messages has 307000