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linux user

I'm a new Linux user. How do I copy a directory or folder under Linux operating system using command line options and bash shell?
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Linux Rename File Command

I'm a new Linux user. How do I rename a file called resumezzz.pdf to resume.pdf using Linux bash command prompt?
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Linux / UNIX: Kill User Session

How do I kill all users session under Linux or UNIX operating system using command prompt?
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Linux / UNIX: Untar / Extract a .lzma Tar Ball

I’ve downloaded a file called file.tar.lzma tar ball from the Internet but I am not able to open tar ball. How do I open or extract a .lzma file under Linux or UNIX like operating systems using command line options?
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All my local Linux user accounts will be able to log in to my Samba server and access share. How do I restrict access to particular users or network subnet such as 192.168.2.1/24?
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Linux Create User Account

Q. How do I create create a new Linux user account ? How do update or modify default Linux new user information? Using the command prompt (shell) tools, how do I add a user to the system? What are command line options for adding a user?
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Monitor Linux user activity in real time

Q. How do I Monitor Linux User Activity in real time?

A. The whowatch program scans the most current common log file of Linux server and creates the following statistics in real time:

=> The users currently logged on to the machine, in real-time.
=> User login name,
=> User tty
=> User host name
=> User's process
=> The type of the connection (ie. telnet or ssh)
=> Display of users command line can be switch to tty idle time.
=> Certain user can be selected and his processes tree may be viewed as well as tree of all system processes.
=> Kill user process etc

I have already written how to install and configure whowatch. Please refer this previous article.