If you ever need to count the occurences of a character in all (or some) files, this next series of commands would come in handy: for f in `ls`; do cat $f; done | awk ‘{ for ( i=1; i<=length; i++ ) arr[substr($0, i, 1)]++ }END{ for ( i in …
The dd utility can be successfully used to create a backup of a filesystem (in lack of more specialised backup utilites). dd if=/dev/sdaX | gzip > /backup/sdaX.gz where sdaX is the partition you want to backup, and the /backup folder is located on a different disk/partition than the one you’re …
This function comes in handy when you want to make a compressed sector-by-sector backup of your Linux filesystem and you don’t want to include/waste space with the unused sector (which still have information on them) Running nice cat /dev/zero > zero.fill;sync;sleep 1;sync;rm -f zero.fill before the actual backup will make …
I updated my server’s operating system from Fedora Core 6 (on which VMware Server ran perfectly) to Fedora 8. Fedora 6 was running an older 2.6.25 (which VMware liked just fine), but Fedora 8 brought me the 2.6.26.6-49.fc8 kernel, which caused a lot of trouble.
After spending 5 hours looking everywhere for a solution (I even thought the newer v1.08 would work on this kernel – but it didn’t), I considered writing down what I did to finally get my virtual machines up and running:
