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You can use tar's --one-file-system flag (possible -l (ell) still works). That will stop tar descending into your mounted filesystems, including your backup disc.
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You can use tar's --one-file-system flag (possible -l (ell) still works). That will stop tar descending into your mounted filesystems, including your backup disc.

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How can i back up Debian linux &nbsp;, I have one folder /mnt/backup &nbsp;this folder is second hardrive I noneed to back up
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How can i back up Debian linux  , I have one folder /mnt/backup  this folder is second hardrive I noneed to back up

Back up

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

A Linux distribution is an operating system made as a software collection based on the Linux kernel and, often, on a package management system and are available for a variety of systems. A typical Linux distribution comprises a Linux kernel, GNU tools and libraries, additional software, documentation, a window system (the most common being the X Window System), a window manager, and a desktop environment. Most Linux systems are open-source software made available both as compiled binaries and in source code form, allowing modifications to the original software. Over three hundred distributions are in active development, including commercially backed distributions (such as Fedora, openSUSE and Ubuntu) and community-driven distributions (such as Debian, Slackware, Gentoo and Arch Linux).