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cp command

Debian / Ubuntu: apt-get Force Reinstall Package

I am a new Debian Linux v.7.x / Ubuntu Linux LTS user. How do I reinstall a package using apt-get command line?
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I know how to send WOL command using Linux or FreeBSD wake command. But, how do I send Wake on LAN (WOL) frames to hosts on a local Ethernet network using Apple OS X Unix operating systems to wake up my servers or nas devices?
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Unix Copy Command Examples [ cp command ]

How do I copy files under Unix operating system using ksh or csh or bash shell prompt?
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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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I've recently swiched from Ubuntu Linux to CentOS / RHEL / Scientific Linux version 6 gnome desktop. However, I'm unable to find the gpass the password manager for GNOME2 desktop in repo. How do I install the same under RHEL 6 or CentOS or Scientific Linux 6 or Fedora Linux 15?
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Q. I've backup created using rsync command stored at /disk2/home/tom/ directory. Accidentally, I had deleted files from /home/tom directory. I'd like to restore all file names starting with alpha numeric characters from /disk2/home/tom/ to /home/tom. How do I restore selected files in a batch mode?
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Setting Up a CentOS / Red Hat Linux DHCP Client

Q. How do I setup my Red Hat / CentOS / Fedora Linux system to get IP address and other information via a DHCP server for eth0 interface?
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