dd and fallocate and truncate to make big files quick ########################################## Every example below will be with creating a 10 gig file. dd will take time, where as fallocate and truncate willRead More…

THE SPEECH BEFORE THE SCRIPT tl;dr note you can just skip to the script below if you want This script uses ddrescue (the newer one between gddrescue and ddrescue, so it uses gddrescueRead More…

note to self about dd sizes ##################### Pick small block size then multiply by count to get size ex: dd if=/dev/zero bs=1M count=1024 That will get 1 Mib of a block sizeRead More…

######################### # ionice and nice notes # ######################### # nice -n19 is nicest on CPU priority # ionice -c2 -n7 is nicest on IO priority also so is ionice -c3. ionice -c3Read More…

Are the units in Base 2 (Mib,Gib,Tib) or in Base 10 (MB,GB,TB). They say “MB,GB,TB” but that is commonly misused. mdadm seems to be the only thing that truely has it right.Read More…

Using SED to Extract Info out of Data ############################# We will use sed which is a common tool for search and replace to extract information. Sed is very powerful because its aRead More…

################################### # FIX MISSING GPG KEY FOR APT-GET # ################################### # When running "apt-get update" If get error like this: # W: GPG error: http://ftp.us.debian.org squeeze-updates Release: The following signatures couldn't beRead More…

Note to self – Installing drive RTL8723AS on Lenovo Yoga 13 Tested on 3.13.5 on Debian 7.4. Although this is a note to self, im sure others can use this as well.Read More…