some cleanup and such

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+# Oneliners
+
+A Growing Collection of Linux Command Line One-Liners
+
+Please believe me... this collection was really supposed to grow over time...
+
+inside a direcotry show disk usage of all hidden files and directories and sort by size:
+
+    $ du $(ls .* -d | tail -n +3) -hs |sort -h
+
+inside a direcotry show disk usage of all files and directories (also hidden) and sort by size.
+Exclude 'garbage' file.
+
+    $ du . -a -d 1 -h --exclude=garbage | sort -h
+
+Tar all files in current directory, excluding ./DATA and ./.cache
+
+    $ tar --exclude=.cache -cvf home_miguel_20180216.tar .
+
+Find files in ./ARCHIVE NOT belonging to a specific user: miguel
+
+    $ find ARCHIVE/ \! -user miguel
+
+set folder/ permissions to Read/Browse only for owner recursively
+
+    $ sudo chmod -R u=r,g=,o= folder/
+    $ chmod -R u=rX,g=,o= folder/
+
+find all mails from Boban when in the maildir full of mailboxes and print only short headers without bodies:
+
+    $ grepmail -H -B -Y ‘(^TO:|^From:)’ Boban *
+
+not really a one-lier but will print 256 colors in a bash:
+
+    for i in {0..255} ; do
+        printf "\x1b[48;5;%sm%3d\e[0m " "$i" "$i"
+        if (( i == 15 )) || (( i > 15 )) && (( (i-15) % 6 == 0 )); then
+            printf "\n";
+        fi
+    done
+