[olug] Newbie Bash Scripting Tutorial

[DYNATRON tech]

> (output to file), >> (append to file), and | (pipe to command) are very
powerful. never forget them.

this thread itself has become an awesome reference as well.
[this thread] > ~/olug.bash.reference


On Thu, Sep 17, 2009 at 9:14 AM, Christopher Cashell <topher-olug at zyp.org>wrote:

> On Thu, Sep 17, 2009 at 12:59 AM, Rob Townley <rob.townley at gmail.com>
> wrote:
> > I depended on google too much for information that i had totally
> > forgot was built into *nix systems and wasted time, so a friendly
> > reminder of all the reference material built-in at the command line.
>
> [Snip.]
>
> > We often forget the info built into the OS and accessible from the
> > command line.  Tutorials are fine but when hacking at a problem, quick
> > access to some essentials can be more useful.
>
> This reminds me of another command that many newer people might not be
> aware of: 'apropos' (also known as 'man -k').  apropos searches local
> command documentation (man pages).  You can use regular expressions as
> the argument to it, and it will search the name and descriptions for
> man pages.
>
> For example, maybe I've heard that there's a grep command for use with
> compressed files, but I can't remember what it's called.  So, I'll
> search for things related to grep:
>
> topher at nexus:~$ apropos grep
> ack-grep (1p)        - grep-like text finder
> agrep (1)            - search a file for a string or regular expression,
> with...
> bzegrep (1)          - search possibly bzip2 compressed files for a regular
> e...
> bzfgrep (1)          - search possibly bzip2 compressed files for a regular
> e...
> bzgrep (1)           - search possibly bzip2 compressed files for a regular
> e...
> degrep (1)           - - grep through files belonging to an installed
> Debian ...
> dfgrep (1)           - - grep through files belonging to an installed
> Debian ...
> dgrep (1)            - - grep through files belonging to an installed
> Debian ...
> dzgrep (1)           - - grep through files belonging to an installed
> Debian ...
> egrep (1)            - print lines matching a pattern
> fgrep (1)            - print lines matching a pattern
> git-grep (1)         - Print lines matching a pattern
> grep (1)             - print lines matching a pattern
> grep-aptavail (1)    - grep Debian control files
> grep-available (1)   - grep Debian control files
> grep-dctrl (1)       - grep Debian control files
> grep-debtags (1)     - grep Debian control files
> grep-status (1)      - grep Debian control files
> grepcidr (1)         - Filter IP addresses matching IPv4 CIDR/network
> specifi...
> grepdiff (1)         - show files modified by a diff containing a regex
> grepjar (1)          - search files in a jar file for a pattern
> grepmail (1p)        - search mailboxes for mail matching a regular
> expression
> Mail::Box::Search::Grep (3pm) - select messages within a mail box like grep
> does
> Mail::Mbox::MessageParser::Grep (3pm) - A GNU grep-based mbox folder reader
> mboxgrep (1)         - displays email messages matching a pattern
> ngrep (8)            - network grep
> numgrep (1)          - This program is the numeric equivilent of the grep
> uti...
> pcregrep (1)         - a grep with Perl-compatible regular expressions.
> pfunc (1p)           - grep for perl functions
> pgrep (1)            - look up or signal processes based on name and other
> at...
> POE::Filter::Grep (3pm) - select or remove items based on simple rules
> rgrep (1)            - print lines matching a pattern
> sgrep (1)            - search a file for a structured pattern
> tre-agrep (1)        - print lines approximately matching a pattern
> xml_grep (1p)        - grep XML files looking for specific elements
> zegrep (1)           - search possibly compressed files for a regular
> expression
> zfgrep (1)           - search possibly compressed files for a regular
> expression
> zgrep (1)            - search possibly compressed files for a regular
> expression
> zipgrep (1)          - search files in a ZIP archive for lines matching a
> pat...
> zpcregrep (1)        - a grep with Perl-compatible regular expressions.
>
> There I see zgrep, which is what I was looking for.
>
> For more information, try 'man apropos'.  Many times you might suspect
> there's a command out there to do what you want, but you aren't sure
> what that command might be.  Using apropos with some related terms to
> what you're trying to do could help find the command you need.
>
> --
> Christopher
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