User management in Ubuntu

Show last user logins into the system
lastlog | less
Currently logged in users in the system

Add new user
adduser username usergroupname (perl calling useradd)
useradd username

Delete user
userdel username
userdel -r username removing home directory

deluser with /etc/deluser.conf (Debian and derivatives)
deluser --remove-home



Windows 10 Add better sendto functionality

Read More

Adds multiple file send to functionality
Create SendToMailRecipient.vbs somewhere executable with the code below
Create a shortcut link to it
Put the link in the directory opened with shell:sendto

Option Explicit
Dim objArgs, OutApp, oNameSpace, oInbox, oEmailItem, olMailItem
Dim a, oAttachments, subjectStr, olFormatHTML
olMailItem = 0
olFormatHTML = 2
Set objArgs = WScript.Arguments 'gets paths of selected files
Set OutApp = CreateObject("Outlook.Application") 'opens Outlook
Set oEmailItem = OutApp.CreateItem(olMailItem) 'opens new email
For a = 0 to objArgs.Count - 1
Set oAttachments = oEmailItem.Attachments.Add(objArgs(a))
subjectStr = subjectStr & Right(objArgs(a),Len(objArgs(a))-(InStrRev(objArgs(a),"\"))) & ", " 'recreates the default Subject e.g. Emailing: file1.doc, file2.xls
If subjectStr = "" then subjectStr = "No Subject "
oEmailItem.Subject = "Emailing: " & Left(subjectStr, (Len(subjectStr)-2))
oEmailItem.BodyFormat = olFormatHTML