Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: False positive grep?
Top Forums Shell Programming and Scripting False positive grep? Post 303045949 by MadeInGermany on Sunday 19th of April 2020 05:54:52 AM
Old 04-19-2020
&2>/dev/null is still odd, the & is too many. The & before a descriptor number is needed on the RHS only, to distinguish it from a file name.
And, the only errors that a [[ ]] can produce are "syntax error", "not an integer", "division by zero". You want to see them!
If you want to supress an error from an embedded sub shell expression than redirect it within the sub shell.

In general, only suppress error messages when it makes sense - they help you!

And yes, I meant the
Code:
builtin echo "$NUM" | $GREP -E -q "[a-zA-Z]"  && continue

that should become
Code:
[[ "$NUM" =~ [a-zA-Z] ]] && continue

Last edited by MadeInGermany; 04-19-2020 at 09:24 AM.. Reason: correction: no surrounding *
This User Gave Thanks to MadeInGermany For This Post:
sea
 

8 More Discussions You Might Find Interesting

1. Linux

bin\false

We have requirments to not allow a userid login abilities but allow users to 'su' to it. In solaris I normally set the shell in /etc/passwd to bin/false. THis does not work on Linux, any suggestions would help. (1 Reply)
Discussion started by: bryanthomas
1 Replies

2. Shell Programming and Scripting

false use of sed???

i want to delete every newline and every line which starts with "RECORD......." in a file. FILE: Record 61391 in base BROCKHAUS (Timestamp: 2008-04-09 11:38:38) UNTERTITEL : Gräfin (seit 1707 Reichsgräfin) von, * Schwerin 4. 2. 1686, + Berlin 21. 10. 1744; wurde Record 61392 in base BROCKHAUS... (4 Replies)
Discussion started by: trek
4 Replies

3. Shell Programming and Scripting

Why is it always false?

Hi, I'm new to UNIX and am trying to learn shell scripting in order to work on an interface that I inherited when a co-worker left. I need to be able to check to see whether a file exists to determine whether the FTP has taken place, but in testing, the if statement always evaluates as false,... (3 Replies)
Discussion started by: JeffR
3 Replies

4. Shell Programming and Scripting

False Condition

Hi All, I am using the below Script to enter a line in the File: #!/bin/ksh # To delete the last line if it contains the pattern Redirect permanent / Virgin Atlantic Airways - Popup echo "Enter the URL that should point to the particular microsite" read url # To delete the last line if it... (0 Replies)
Discussion started by: Shazin
0 Replies

5. IP Networking

false tcp connection

Why this happens? How to solve this? $netstat -na |grep 9325 tcp 0 0 127.0.0.1:9325 127.0.0.1:9325 ESTABLISHED When a client socket repeatedly tries to connect to an inactive(no server socket is listening on this port) local port,connect succeeds. ... (1 Reply)
Discussion started by: johnbach
1 Replies

6. AIX

Gid=0 and 7 + admin=FALSE

Checking configuration access files for an AIX server, left me wondering about this :confused:: If a user is added to system group, it gets gid=0 with some security risks because it gets some root kind of file access level. Is this insecure condition kept if the user has admin variable... (0 Replies)
Discussion started by: bkiddo
0 Replies

7. UNIX for Dummies Questions & Answers

Tail with positive offset

I have read the below from the book bash cookbook.Tail +1 filenames is similar to cat filename I have tried the same in Ubuntu 11.10 with bash. 4.0 . I have received error for the Same. May I know in which system that will work fine ? Thanks (1 Reply)
Discussion started by: pandeesh
1 Replies

8. Shell Programming and Scripting

False alerts

Hi I have written a script to send email alerts when load of my linux server reaches max point I keep getting false emails thought the load is normal , looks like same email is generated again and again - called from cron tab checked if the tempfile is present , no it is not , cleaned... (22 Replies)
Discussion started by: anil529
22 Replies

LEARN ABOUT MOJAVE

locale::codes::langfam

Locale::Codes::LangFam(3pm)				 Perl Programmers Reference Guide			       Locale::Codes::LangFam(3pm)

NAME

       Locale::Codes::LangFam - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangFam;

	  $lext = code2langfam('apa');		       # $lext gets 'Apache languages'
	  $code = langfam2code('Apache languages');    # $code gets 'apa'

	  @codes   = all_langfam_codes();
	  @names   = all_langfam_names();

DESCRIPTION

       The "Locale::Codes::LangFam" module provides access to standard codes used for identifying language families, such as those as defined in
       ISO 639-5.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 639-5
       language family codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language families. A code set may be specified using either a name, or a
       constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langfam('apa','alpha');
	  $lext = code2langfam('apa',LOCALE_LANGFAM_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from ISO 639-5 such as 'apa' for Apache languages.

	   This is the default code set.

ROUTINES

       code2langfam ( CODE [,CODESET] )
       langfam2code ( NAME [,CODESET] )
       langfam_code2code ( CODE ,CODESET ,CODESET2 )
       all_langfam_codes ( [CODESET] )
       all_langfam_names ( [CODESET] )
       Locale::Codes::LangFam::rename_langfam  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangFam::add_langfam  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangFam::delete_langfam  ( CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangFam::delete_langfam_alias  ( NAME )
       Locale::Codes::LangFam::rename_langfam_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::delete_langfam_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.loc.gov/standards/iso639-5/id.php
	   ISO 639-5 .

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.18.2							    2013-11-04					       Locale::Codes::LangFam(3pm)
All times are GMT -4. The time now is 05:03 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy