Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: ls grep query
Special Forums UNIX Desktop Questions & Answers ls grep query Post 302430899 by tmn0004676 on Saturday 19th of June 2010 12:40:50 PM
Old 06-19-2010
Quote:
Originally Posted by scottn
It makes no difference here
Code:
$ ls | grep f*.
abc
def
hij

So what did you mean by "I changed the question a bit but I don't think it would have made any difference..."?
Here you go

The following command is executed:

$ ls
defer dir1 dir3 file2 fileb flower list script1
defer2 dir2 file1 filea filec fruit output veg
You execute the command:


ls | grep f*.


Which files will be displayed?

A. All of the files. B. Only the files that begin with an f. C. All of the files that contain an f. D. None of the files.







The Answer is showing as



Answer A is incorrect. None of the files will be displayed

Answer B is incorrect. None of the files will be displayed

Answer C is incorrect. None of the files will be displayed

Answer D is correct. None of the files are displayed as the shell has matched the pattern f*, so the command has no output to check against


 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

query on grep command

Hai Friends Can anyone provide me a grep command to print x to y lines in a file. For example: grep command to display 15th line to 21st Thanks in advance Collins (4 Replies)
Discussion started by: collins
4 Replies

2. Shell Programming and Scripting

Query regarding grep

In what cases the following command ignores lines in input file: $ grep -c "^" inputfile (1 Reply)
Discussion started by: amicon007
1 Replies

3. Shell Programming and Scripting

grep command query

Hi I have file like this: Sun Jan 24 03:00:00 2010: *** Weekly Process - get_ens_files.pl START *** Sun Jan 24 03:00:00 2010: *** *** Sun Jan 24 03:00:00 2010: *************************************************** Sun Jan 24 03:00:11 2010: ... (2 Replies)
Discussion started by: koti_rama
2 Replies

4. Shell Programming and Scripting

Query Oracle tables and return values to shell script that calls the query

Hi, I have a requirement as below which needs to be done viz UNIX shell script (1) I have to connect to an Oracle database (2) Exexute "SELECT field_status from table 1" query on one of the tables. (3) Based on the result that I get from point (2), I have to update another table in the... (6 Replies)
Discussion started by: balaeswari
6 Replies

5. Shell Programming and Scripting

Grep query

As part of my never-ending nagios automation project I am need to implement the following run line into a loop; -bash-3.00$ grep ${feed} /usr/local/feed/service/clients/*/bin/* | awk -F/ '{print "To restart: /"$2"/"$3"/"$4"/"$5"/"$6"/"$7"/"$8"/"$9}' Which prints to screen; To restart:... (3 Replies)
Discussion started by: JayC89
3 Replies

6. Shell Programming and Scripting

grep/sed query

Hi all, I have one query,in my script,i give one input like sectionname that enclose with and that will search in specific file in specific directory.If found ,then it's search next section and begin of section ,sometext means different sectionname. p1 p2 p3 p4 p5 p6 I want to... (2 Replies)
Discussion started by: suryanarayan
2 Replies

7. UNIX for Dummies Questions & Answers

query related to grep

Hi All, The result for 'grep "cert_codes" /develop/sales/appl.srce/*.4gl' command will be saved at aa.txt grep "cert_codes" /develop/sales/appl.srce/*.4gl >aa.txt But I am not sure, whether, all result stored in .txt file in case of multi-line result. Please revert back if... (2 Replies)
Discussion started by: pbankar
2 Replies

8. Shell Programming and Scripting

grep command query

list ALL file entries with a last modification date of September 20. using grep (1 Reply)
Discussion started by: polineni
1 Replies

9. Shell Programming and Scripting

Grep query

Hi, What does this line do grep -E 'ORA-' $LIN_TOP/log/status.log > /dev/null 2>&1 Does this check in status.log and in std out, stderr also.? Thanks (3 Replies)
Discussion started by: nag_sathi
3 Replies

10. UNIX for Dummies Questions & Answers

File grep quick query

Hi Experts, I need some suggestion on file grep. I am trying to find multiple pattern with the file grep as below grep "2013" trace.log | grep -f pattern.cfg -i > $LOG if ; then mail -s "Exception" "sample@abc.com" < $LOG fi Is it possible to obtain what pattern I got in the... (5 Replies)
Discussion started by: senthil.ak
5 Replies

LEARN ABOUT LINUX

zegrep

ZGREP(1)                                                      General Commands Manual                                                     ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep  options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

                                                                                                                                          ZGREP(1)
All times are GMT -4. The time now is 01:13 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy