Top Forums Shell Programming and Scripting please help (closed homework thread) Post 50790 by djeung on Sunday 2nd of May 2004 07:44:01 PM
please help

I have these questions for my unix class that I can't figure out because I missed a couple of days. They are for a quiz we took last week so by answering the questions you are not bettering my grade or doing my homework. I just want to understand was the answers. My teacher is really bad at explaining things.


1. Matcha line containing the assignment of a value to a legal shell variable in grep.

2. Match a word containing a repeating sequence of characters, with one or more characters in between, in grep, e.g., match "abcxyabc" or "xax", but not "abcd" or "aa".

3. Exchange the second and third words on a line with at least 4 words in sed, leaving the rest unchanged, e.g., "hi there joe kool" becomes "hi joe there kool", but "hi there joe" is unchanged.

4. Match lines containing one or more letters immediately followed by one or more digits in grep, e.g., match "abc123" or "a7" but not "az-12".

5. Match lines containing a repeating sequence of letters followed at any distance by one or more digits in grep, e.g., match "axax123" or "aaxyz7" but not "az12" in grep.
 
Test Your Knowledge in Computers #603
Difficulty: Medium
MySQL 8.0 does not maintain information about password history so you cannot enabling restrictions on reuse of previous passwords.
True or False?

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DPKG-PRECONFIGURE(8)						      Debconf						      DPKG-PRECONFIGURE(8)

NAME
dpkg-preconfigure - let packages ask questions prior to their installation SYNOPSIS
dpkg-preconfigure [options] package.deb dpkg-preconfigure --apt DESCRIPTION
dpkg-preconfigure lets packages ask questions before they are installed. It operates on a set of debian packages, and all packages that use debconf will have their config script run so they can examine the system and ask questions. OPTIONS
-ftype, --frontend=type Select the frontend to use. -pvalue, --priority=value Set the lowest priority of questions you are interested in. Any questions with a priority below the selected priority will be ignored and their default answers will be used. --terse Enables terse output mode. This affects only some frontends. --apt Run in apt mode. It will expect to read a set of package filenames from stdin, rather than getting them as parameters. Typically this is used to make apt run dpkg-preconfigure on all packages before they are installed. To do this, add something like this to /etc/apt/apt.conf: // Pre-configure all packages before // they are installed. DPkg::Pre-Install-Pkgs { "dpkg-preconfigure --apt --priority=low"; }; -h, --help Display usage help. SEE ALSO
debconf(7) AUTHOR
Joey Hess <joeyh@debian.org> 2011-06-22 DPKG-PRECONFIGURE(8)

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