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  2. List of POSIX commands - Wikipedia

    en.wikipedia.org/wiki/List_of_POSIX_commands

    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 a file Version 5 AT&T UNIX delta: SCCS Optional (XSI) Make a delta (change) to an ...

  3. Ubuntu Professional Certification - Wikipedia

    en.wikipedia.org/wiki/Ubuntu_Professional...

    Photo of Ubuntu Certificate. Ubuntu Professional Certification which was introduced in May 2006, [1] was a computer based examination about the Ubuntu operating system.. The test was administered by the LPI (Linux Professional Institute) and the certification was part of the LPIC (Linux Professional Institute Certification) as an added module/exam to LPI 117-101 and LPI 117-102 certs.

  4. Privacy-Enhanced Mail - Wikipedia

    en.wikipedia.org/wiki/Privacy-Enhanced_Mail

    PEM data is commonly stored in files with a ".pem" suffix, a ".cer" or ".crt" suffix (for certificates), or a ".key" suffix (for public or private keys). [3] The label inside a PEM file represents the type of the data more accurately than the file suffix, since many different types of data can be saved in a ".pem" file.

  5. Linux - Wikipedia

    en.wikipedia.org/wiki/Linux

    This is an accepted version of this page This is the latest accepted revision, reviewed on 26 January 2025. Family of Unix-like operating systems This article is about the family of operating systems. For the kernel, see Linux kernel. For other uses, see Linux (disambiguation). Operating system Linux Tux the penguin, the mascot of Linux Developer Community contributors, Linus Torvalds Written ...

  6. PKCS 8 - Wikipedia

    en.wikipedia.org/wiki/PKCS_8

    In cryptography, PKCS #8 is a standard syntax for storing private key information. PKCS #8 is one of the family of standards called Public-Key Cryptography Standards (PKCS) created by RSA Laboratories.

  7. PKCS 12 - Wikipedia

    en.wikipedia.org/wiki/PKCS_12

    It is commonly used to bundle a private key with its X.509 certificate or to bundle all the members of a chain of trust. A PKCS #12 file may be encrypted and signed. The internal storage containers, called "SafeBags", may also be encrypted and signed. A few SafeBags are predefined to store certificates, private keys and CRLs. Another SafeBag is ...

  8. List of FTP commands - Wikipedia

    en.wikipedia.org/wiki/List_of_FTP_commands

    Note that most command-line FTP clients present their own non-standard set of commands to users. For example, GET is the common user command to download a file instead of the raw command RETR . Command

  9. Simple Certificate Enrollment Protocol - Wikipedia

    en.wikipedia.org/wiki/Simple_Certificate...

    The Simple Certificate Enrollment Protocol still is the most popular and widely available certificate enrollment protocol, being used by numerous manufacturers of network equipment and software who are developing simplified means of handling certificates for large-scale implementation to everyday users.