Sed – Make a backup before running Expression
Lets say you want to run a sed command, but you want it to save a backup before editing a file. Here is how you do that: sed -i.bak -e 'SED EXPRESSIONRead More…
All posts by kossboss
Mount/Initiate to Iscsi Luns Locally – Mount Luns – Mount Partitioned ISOs
Note to self 2022-09-15: if you are looking for a “firmware analyzer” or a tool that finds magic file headers at all locations inside of a file (and looks for embedded files).Read More…
Apt – see how many packages in each repo
When you run apt-get update, it keeps a list of everything in /var/lib/apt/lists/ inside the files that end with “_Packages”. So you can parse the files for lines that begin with theRead More…
Setting UTF8 encoding on putty & linux – What are question mark ??? files
If you see ‘?’ mark files with ‘ls’ or ‘find’, most likely they are different lang chars (chinise,hebrew,japanes,russian) Im not just talking about ?, also im talking about chars like this é ForRead More…
Mdadm Raid10 Pairs
There are 2 ways to RAID10 with mdadm. With 1 layer of mdadm or with 2 layers of mdadm. I would prefer the 1 layer of mdadm (meaning using mdadm level 10Read More…
Bash/Linux – Folder Flattening Script (keep X number of subfolders)
A folder flattening script for your files. Takes files and folders in a location & makes the folder tree less deep (if files have same name it will rename a file so thatRead More…
AWK RETURNS ERROR WHEN PRINTF PASSED A VARIABLE WITH PERCENT SIGN %
# echo "thislinehas%allovertheplace%%asdf%%" | awk '{print $0}' thislinehas%allovertheplace%%asdf%% Really quick… the above and below commmand simply tells awk to print the inputed line, so that the output should look as if itRead More…
AWK – convert BYTES to HUMAN READABLE
Use this convertbytes2human function, If you want to convert a number of bytes (for example 43252) or an exponential number number of bytes (such as 1.03e5) to a human readable size. NOTE: sinceRead More…
AWK – missing ABS – Absolute Value
# Awk is missing ABS – absolute value – so we have to make it. # if you want to do: y=abs(x) # you cant just write the above as abs(x) isRead More…
BASH – Seconds to Split Time / Human Readable Converter – Convert seconds to hours, minutes, seconds
This will convert a second into a more feasible number split up into parts of hrs/min/sec (or if you want also days and weeks and years) Provided 5 configurations of this converterRead More…