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  2. List of GNU Core Utilities commands - Wikipedia

    en.wikipedia.org/wiki/List_of_GNU_Core_Utilities...

    Changes file security context chgrp: Changes file group ownership chown: Changes file ownership chmod: Changes the permissions of a file or directory cp: Copies a file or directory dd: Copies and converts a file df: Shows disk free space on file systems dir: Is exactly like "ls -C -b". (Files are by default listed in columns and sorted vertically.)

  3. List of POSIX commands - Wikipedia

    en.wikipedia.org/wiki/List_of_POSIX_commands

    C programming Optional (SD) Create a tags file 3BSD cut: Text processing Mandatory Cut out selected fields of each line of a file System III cxref: C programming Optional (XSI) Generate a C-language program cross-reference table System V date: Misc Mandatory Display the date and time Version 1 AT&T UNIX dd: Filesystem Mandatory Convert and copy ...

  4. Linux Security Modules - Wikipedia

    en.wikipedia.org/wiki/Linux_Security_Modules

    Linux Security Modules (LSM) is a framework allowing the Linux kernel to support, without bias, a variety of computer security models.LSM is licensed under the terms of the GNU General Public License and is a standard part of the Linux kernel since Linux 2.6.

  5. Lynis - Wikipedia

    en.wikipedia.org/wiki/Lynis

    Lynis is an extensible security audit tool for computer systems running Linux, FreeBSD, macOS, OpenBSD, Solaris, and other Unix derivatives.It assists system administrators and security professionals with scanning a system and its security defenses, with the final goal being system hardening.

  6. Unix security - Wikipedia

    en.wikipedia.org/wiki/Unix_security

    A core security feature in these systems is the file system permissions. All files in a typical Unix filesystem have permissions set enabling different access to a file. Unix permissions permit different users access to a file with different privilege (e.g., reading, writing, execution).

  7. shred (Unix) - Wikipedia

    en.wikipedia.org/wiki/Shred_(Unix)

    By default, the command overwrites the file three times with multiple patterns, but the number is user configurable. It has an option to do an additional final overwrite with zeroes, which may help to hide the fact that it was used. By default, shred also shreds file slack (unused space in file allocations). For example, a 5 KB file on a file ...

  8. Linux-VServer - Wikipedia

    en.wikipedia.org/wiki/Linux-VServer

    It is not related to the Linux Virtual Server project, which implements network load balancing. Linux-VServer is a jail mechanism in that it can be used to securely partition resources on a computer system (such as the file system , CPU time, network addresses and memory) in such a way that processes cannot mount a denial-of-service attack on ...

  9. Reverse connection - Wikipedia

    en.wikipedia.org/wiki/Reverse_connection

    A reverse connection is usually used to bypass firewall restrictions on open ports. [1] A firewall usually blocks incoming connections on closed ports, but does not block outgoing traffic . In a normal forward connection, a client connects to a server through the server's open port , but in the case of a reverse connection, the client opens the ...