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The purpose of this lab assignment is to practice searching in Unix and using regular expressions....

The purpose of this lab assignment is to practice searching in Unix and using regular expressions.

Task A:
Use the find command to find all directories under /pub/cs/ whose name is cs160a. Be sure to only display the results that match, do not display any error output.
Hint: use: 2>/dev/null.

Task B:
Create a one-line command, using he famous.dat file, to add the word " STREET" to the address, for all who live on 2nd or 3rd.
For example: '2nd' becomes "2nd STREET" and '3rd' becomes "3rd STREET".
Display only the first 9 lines.
Hint: use 2 sed statements with pipes.

Task C:
Display all lines in famous.dat that end in 0 or 1, and have a 1 in the 3rd from the last column.
For example lines ending in 120 and 131 would be displayed.

Task D:
Display all lines in famous.dat that have only 4, 5, 6, 7 and 9 in the zip code.
HINT: this is the same as NOT 0,1,2,3 or 8.

Task E:
Using only the grep command, search all files with names that end in either .html or .htm under the$HOME/public_html directory and display any lines that contain body tags (containing '<body>'). No other output should be displayed even if there is no public_html directory.
Hint: use two command arguments and 2>

Sample Output

A: (note: output may change depending on instructors teaching in any given semester)
/pub/cs/cmetzler/bin/cs160a
/pub/cs/cconner/cs160a
/pub/cs/jpotter/cs160a
/pub/cs/gboyd/cs160a

B:
    01 m motzart       amadeous         25 2nd STREET 94233
    02 m guthrie       woody                23 2nd STREET 94223
    03 f simone         nina                   27 2nd STREET 94112
    04 m lennon        john                   29 2nd STREET 94221
    05 f harris           emmylou            20 2nd STREET 94222
    06 m marley        bob                22 2nd STREET 94112
    07 f marley         rita                     26 2nd STREET 94212
    08 f warwick        dione                 26 2nd STREET 94222
    09 m prine          john                   35 3rd STREET 94321

C:
    26 m moose          bullwinkle      16 1st 94111

D:
    19 f mitchell         joni             40 4th 94444
    24 m heinlein       robert         74 7th 94765
    25 m asimov        isaac          75 7th 94777
    38 f tubman         harriet        50 5th 95555
    41 m douglas       frederick    66 6th 94666
    44 f parks            rosa           72 7th 94777

E:
Note: no output may be produced unless you have files containing '<body>'

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Homework Answers

Answer #1

answer a:
***********

ubuntu17 (fresh) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help You have the Auto capture keyboard opt

as i do not have /pub/cs directory so its not showing anything

Answer b:
***********

ubuntu17 (fresh) [Running]- Oracle VM VirtualBox File Machine View Input Devices Help Terminal Thu 21:50 Activities madhav@ma

Answer c:
***********

ubuntu17 (fresh) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Terminal Thu 21:58 Activities madhav@m

WITHOUT PROPER FAMOUS.DAT FILE CANT FIND THE PROPER ANSWER BUT I TRIED MY LEVEL BEST.

Answer d:
***********

egrep "[45679]{5}$" famous.dat


Answer e:
************

grep -r --include=*.{html,htm} "<body>" $HOME/public_html 2>/dev/null

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