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chmod

summary

    This subchapter looks at chmod, a UNIX (and Linux) command.

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chmod

    This subchapter looks at chmod, a UNIX (and Linux) command.

    chmod is used to change the permissions for a file or directory.

    The chmod command was described in the first UNIX book, UNIX Programmer’s Manual, by Ken Thompson and Dennis Ritchie, published November 3, 1971.

wide open

    The chmod 777 filename command will set the permissions so that filename is wide open to everyone.

    $ chmod 777 filename

    The file owner, the file owner’s group, and other (or world) will all be able to read, write, delete, modify, and execute (run) the file to their heart’s content. This access includes anyone who gets into your system through the internet.

other

    On November 8, 2010, Ramesh Natarajan named this the number 32 most frequently used UNIX/Linux command at this web page 50 Most Frequently Used UNIX / Linux Commands (With Examples).

    In June 2009, Ken Milberg named this command as one of the Top 50 universal UNIX commands at this web page Top 50 Universal INIX commands. Note that this web page requires agreeing to be spammed before you can read it.

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