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 POSIX

vconsole.conf

VCONSOLE.CONF(5)						   vconsole.conf						  VCONSOLE.CONF(5)

NAME

       vconsole.conf - configuration file for the virtual console

SYNOPSIS

       /etc/vconsole.conf

DESCRIPTION

       The /etc/vconsole.conf file configures the virtual console, i.e. keyboard mapping and console font.

       The basic file format of the vconsole.conf is a newline-separated list environment-like shell-compatible variable assignments. It is
       possible to source the configuration from shell scripts, however, beyond mere variable assignments no shell features are supported,
       allowing applications to read the file without implementing a shell compatible execution engine.

       Note that the kernel command line options vconsole.keymap=, vconsole.keymap.toggle=, vconsole.font=, vconsole.font.map=,
       vconsole.font.unimap= may be used to override the console settings at boot.

       Depending on the operating system other configuration files might be checked for configuration of the virtual console as well, however only
       as fallback.

OPTIONS

       The following options are understood:

       KEYMAP=, KEYMAP_TOGGLE=
	   Configures the key mapping table of for they keyboard.  KEYMAP= defaults to us if not set. The KEYMAP_TOGGLE= can be used to configured
	   a second toggle keymap and is by default unset.

       FONT=, FONT_MAP=, FONT_UNIMAP=
	   Configures the console font, the console map and the unicode font map.  FONT= defaults to latarcyrheb-sun16.

EXAMPLE

       Example 1. German keyboard and console

       /etc/vconsole.conf:

	   KEYMAP=de-latin1
	   FONT=latarcyrheb-sun16

SEE ALSO

       systemd(1), loadkeys(1), setfont(8), locale.conf(5)

AUTHOR

       Lennart Poettering <lennart@poettering.net>
	   Developer

systemd 							    10/07/2013							  VCONSOLE.CONF(5)
All times are GMT -4. The time now is 02:19 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy