iostat - The iostat command is used for monitoring system input/output device loading by observing the time the devices are active in relation to their average transfer rates. The iostat command generates reports that can be used to change system configuration to better balance the input/output load between physical disks.
@patryk true story 
yeah some is double we should raise the level ctrl - f find some stuf
tee - read from standard input and write to standard output and files
e2label - Change the label on an ext2/ext3/ext4 filesystem
If you forgot to give a LABEL to a partition, this tool can do it. LABELs are great, you can mount a labeled partition with e.g.
sudo mount LABEL=somename /mnt # ignoring other options in this example
and not have to use things like /dev/sdb3 or UUID=“a-very-long-string”.
rmlint - Tool to remove duplicates and other lint.
1 Like
‘L’ is the next letter
Leafpad - a text editor. And it goes on with a ´D´. 
dd - Destroyer of Disks 
And it goes on with a ´D´.
depmod - creates a list of module dependencies by reading each module under /lib/modules/version and determining what symbols it exports and what symbols it needs. By default, this
list is written to modules.dep, and a binary hashed version named modules.dep.bin, in the same directory. If filenames are given on the command line, only those modules are
examined (which is rarely useful unless all modules are listed). depmod also creates a list of symbols provided by modules in the file named modules.symbols and its binary hashed
version, modules.symbols.bin. Finally, depmod will output a file named modules.devname if modules supply special device names (devname) that should be populated in /dev on boot
(by a utility such as systemd-tmpfiles).
Next is with a ‘D’ 
dmesg -d : Display or control the kernel ring buffer. // -d, --show-delta show time delta between printed messages.
Next is with a ‘D’ ?
nope next g
grep : greps everything 
NAME
grep, egrep, fgrep—Print lines matching a pattern
SYNOPSIS
grep [ –[[AB]]num ][–[CEFGVBchilnsvwx]][–e ] pattern j –ffile ][files… ]
DESCRIPTION
grep searches the named input files (or standard input if no files are named, or the filename – is given) for lines containing a match to the given pattern. By default, grep prints the matching lines.
example:
dmesg | grep failed
poweroff - power-off the machine.
We do need to sleep sometimes, right?
4 Likes
fslint - fslint is a toolset to find various problems with filesystems, including duplicate files and problematic filenames etc.
- available in AUR
topgrade 
upgrade every damn thing in your system with one command (pacman, aur, git, whatever)
- AUR
2 Likes
Doesn’t follow the last letter rule because I just don’t know what the last letter was in the last post 
When you open a terminal window, you are in shell 1
Type in su & password, you are now in shell 2
Type in su username, your are now in shell 3
Type in
echo $SHLVL
3
and it will tell you are in shell level 3
Not something you would use everyday, but you got to admit it is obscure! 
Pudge
Last is topgrade 
. Last letter is e 
exit → log out of session 
1 Like
terminator - one of the best terminal apps out there.
rename - rename files