Howto: Send The Content Of a Text File Using mail Command In Unix / Linux

I‘d like to send an email with the content of a text file using mail command in Unix / Linux operating system. How do I do it?
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Linux / Unix: Tarball Delete ( remove ) File

How do I delete OR remove a single file from within a tar ball under Unix / Linux like operating systems?
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FreeBSD Install VMWare Guest Tools

How do I install VMWare tools under FreeBSD guest operating systems?
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UNIX / Linux: Shell Scripting With mail Command

How do I send e-mails from a shell script including file attachments?
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HowTo: Linux Install LibreOffice

How do I install newly released LibreOffice under Debian, Ubuntu or Fedora Linux?
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UNIX / Linux PGP TarBall File Signature Keys Verification

I‘ve downloaded open-source software from the Internet. The download server also provided me the PGP signature file. How do I verify that signature (file.tar.gz.asc) file against downloaded software release (software.version.tar.gz) under Linux / UNIX operating systems? How can I verify PGP signature of downloaded software on Linux / Unix?
Answer to

Linux: tar Extract Files

How can I extract or uncompress a file from tar ball downloaded from the Internet under Linux using bash command prompt?
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tar gz