Perl is a powerful tool for UNIX-like system management. If you do not know Perl when maintaining the system, you should at least be familiar with SHELL. It is best to be comfortable with both.
Perl is a scripting language. The original designer was Larry Wall and it was published on December 18, 1987. Perl borrowed features from C, sed, awk, shell scripting, and many other programming languages. The most important feature is its internal integration of regular expression functions and the huge third-party code library CPAN.
Perl was originally called pearl, but before the language was officially released, Larry Wall discovered that there was already a programming language "pearl", so he changed the name of the programming language to Perl. There are a few explanations for the four letters of Perl, including the humorous "Pathologically Eclectic Rubbish Lister." "Practical Extraction and Report Language" has appeared in a lot of data about Perl, including the official homepage. But in fact, this long name was made up later. When the first letter of its name is capitalized (Perl), it refers to the programming language, and when there is no capital letter (perl), it refers to its interpreter. It is inappropriate to write Perl as "PERL" because it is not an abbreviation.
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