08-13-2011
Unix Command Urgent Help!
Hi All,
i am new on this forum, can someone please answer the following questions as i am also new for UNIX, you help would be much appreciated:
1. How do you delete the full directory hierarchy?
2. How do you find out all process run by user Kamran ?
3. how would you extract something tar.gz file ?
4. How could you search a string in a file?
5. how could you return a line count from csv file ?
6. Given a csv file with Colum c1 to c5, how could you return only c1, c2 and c5?
7. How can you show the delta between two text files?
8. how can you display non printing character in a text file?
9. How would you create a symbolic link?
10. how would you list row between 100 and 120 of large logerroe.log file?
11. How would you list the contains of directory includes all of its sub directories, providing full details and sorted by modification time?
12. how could you do find replace from command line ?
13. How could you run a script on scheduled time
14. someone spread several copies of binaries throughout the system, several of them possible in your path, how would you know which binaries you are using when calling from command line ?
15. how would you setup the value of environment variable to output of a command
if someone can help me for the answers it would be really great help, as i need the answer asap.
Many thanks
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LEARN ABOUT OSX
extutils::command
ExtUtils::Command(3pm) Perl Programmers Reference Guide ExtUtils::Command(3pm)
NAME
ExtUtils::Command - utilities to replace common UNIX commands in Makefiles etc.
SYNOPSIS
perl -MExtUtils::Command -e cat files... > destination
perl -MExtUtils::Command -e mv source... destination
perl -MExtUtils::Command -e cp source... destination
perl -MExtUtils::Command -e touch files...
perl -MExtUtils::Command -e rm_f files...
perl -MExtUtils::Command -e rm_rf directories...
perl -MExtUtils::Command -e mkpath directories...
perl -MExtUtils::Command -e eqtime source destination
perl -MExtUtils::Command -e test_f file
perl -MExtUtils::Command -e test_d directory
perl -MExtUtils::Command -e chmod mode files...
...
DESCRIPTION
The module is used to replace common UNIX commands. In all cases the functions work from @ARGV rather than taking arguments. This makes
them easier to deal with in Makefiles. Call them like this:
perl -MExtUtils::Command -e some_command some files to work on
and NOT like this:
perl -MExtUtils::Command -e 'some_command qw(some files to work on)'
For that use Shell::Command.
Filenames with * and ? will be glob expanded.
FUNCTIONS
cat
cat file ...
Concatenates all files mentioned on command line to STDOUT.
eqtime
eqtime source destination
Sets modified time of destination to that of source.
rm_rf
rm_rf files or directories ...
Removes files and directories - recursively (even if readonly)
rm_f
rm_f file ...
Removes files (even if readonly)
touch
touch file ...
Makes files exist, with current timestamp
mv
mv source_file destination_file
mv source_file source_file destination_dir
Moves source to destination. Multiple sources are allowed if destination is an existing directory.
Returns true if all moves succeeded, false otherwise.
cp
cp source_file destination_file
cp source_file source_file destination_dir
Copies sources to the destination. Multiple sources are allowed if destination is an existing directory.
Returns true if all copies succeeded, false otherwise.
chmod
chmod mode files ...
Sets UNIX like permissions 'mode' on all the files. e.g. 0666
mkpath
mkpath directory ...
Creates directories, including any parent directories.
test_f
test_f file
Tests if a file exists. Exits with 0 if it does, 1 if it does not (ie. shell's idea of true and false).
test_d
test_d directory
Tests if a directory exists. Exits with 0 if it does, 1 if it does not (ie. shell's idea of true and false).
dos2unix
dos2unix files or dirs ...
Converts DOS and OS/2 linefeeds to Unix style recursively.
SEE ALSO
Shell::Command which is these same functions but take arguments normally.
AUTHOR
Nick Ing-Simmons "ni-s@cpan.org"
Maintained by Michael G Schwern "schwern@pobox.com" within the ExtUtils-MakeMaker package and, as a separate CPAN package, by Randy Kobes
"r.kobes@uwinnipeg.ca".
perl v5.16.2 2012-10-11 ExtUtils::Command(3pm)