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  2. grep - Wikipedia

    en.wikipedia.org/wiki/Grep

    grep is a command-line utility for searching plaintext datasets for lines that match a regular expression.Its name comes from the ed command g/re/p (global regular expression search and print), which has the same effect.

  3. xargs - Wikipedia

    en.wikipedia.org/wiki/Xargs

    The word sh at the end of the line is for the POSIX shell sh -c to fill in for $0, the "executable name" part of the positional parameters (argv). If it weren't present, the name of the first matched file would be instead assigned to $0 and the file wouldn't be copied to ~/backups.

  4. Namespace - Wikipedia

    en.wikipedia.org/wiki/Namespace

    Storage devices use directories (or folders) as namespaces. This allows two files with the same name to be stored on the device so long as they are stored in different directories. In some programming languages (e.g. C++, Python), the identifiers naming namespaces

  5. Regular expression - Wikipedia

    en.wikipedia.org/wiki/Regular_expression

    He later added this capability to the Unix editor ed, which eventually led to the popular search tool grep's use of regular expressions ("grep" is a word derived from the command for regular expression searching in the ed editor: g/re/p meaning "Global search for Regular Expression and Print matching lines"). [15]

  6. glob (programming) - Wikipedia

    en.wikipedia.org/wiki/Glob_(programming)

    A screenshot of the original 1971 Unix reference page for glob – the owner is dmr, short for Dennis Ritchie.. glob() (/ ɡ l ɒ b /) is a libc function for globbing, which is the archetypal use of pattern matching against the names in a filesystem directory such that a name pattern is expanded into a list of names matching that pattern.

  7. AWK - Wikipedia

    en.wikipedia.org/wiki/AWK

    The subscript of ENVIRON is the name of an environment variable; its result is the variable's value. This is like the getenv function in various standard libraries and POSIX. The shell script makes an environment variable pattern containing the first argument, then drops that argument and has awk look for the pattern in each file.

  8. Create, delete, or rename folders in AOL Mail

    help.aol.com/articles/create-delete-or-rename...

    1. Mouse over the folder you want to add a subfolder to. 2. Click the Folder Options icon . 3. Select Create subfolder. 4. Enter a new subfolder name. 5. Click the Save icon.

  9. GNU parallel - Wikipedia

    en.wikipedia.org/wiki/GNU_parallel

    find.-name "*.foo"-exec grep bar {} + This searches in all files in the current directory and its subdirectories whose name end in .foo for occurrences of the string bar . The parallel command will work as expected unless a file name contains a newline .