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:
 

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
RAKE(1) 						 Ruby Programmers Reference Guide						   RAKE(1)

NAME
rake -- Ruby Make SYNOPSIS
rake [--f Rakefile] [--version] [-CGNPgnqstv] [-D [PATTERN]] [-E CODE] [-I LIBDIR] [-R RAKELIBDIR] [-T [PATTERN]] [-e CODE] [-p CODE] [-r MODULE] [--rules] [variable=value] target ... DESCRIPTION
Rake is a simple ruby(1) build program with capabilities similar to the regular make(1) command. Rake has the following features: o Rakefiles (Rake's version of Makefiles) are completely defined in standard Ruby syntax. No XML files to edit. No quirky Makefile syntax to worry about (is that a tab or a space?). o Users can specify tasks with prerequisites. o Rake supports rule patterns to synthesize implicit tasks. o Flexible FileLists that act like arrays but know about manipulating file names and paths. o A library of prepackaged tasks to make building rakefiles easier. OPTIONS
--version Display the program version. -C --classic-namespace Put Task and FileTask in the top level namespace -D [PATTERN] --describe [PATTERN] Describe the tasks (matching optional PATTERN), then exit. -E CODE --execute-continue CODE Execute some Ruby code, then continue with normal task processing. -G --no-system --nosystem Use standard project Rakefile search paths, ignore system wide rakefiles. -I LIBDIR --libdir LIBDIR Include LIBDIR in the search path for required modules. -N --no-search --nosearch Do not search parent directories for the Rakefile. -P --prereqs Display the tasks and dependencies, then exit. -R RAKELIBDIR --rakelib RAKELIBDIR --rakelibdir RAKELIBDIR Auto-import any .rake files in RAKELIBDIR. (default is rakelib ) -T [PATTERN] --tasks [PATTERN] Display the tasks (matching optional PATTERN) with descriptions, then exit. -e CODE --execute CODE Execute some Ruby code and exit. -f FILE --rakefile FILE Use FILE as the rakefile. -h --help Prints a summary of options. -g --system Using system wide (global) rakefiles (usually ~/.rake/*.rake ). -n --dry-run Do a dry run without executing actions. -p CODE --execute-print CODE Execute some Ruby code, print the result, then exit. -q --quiet Do not log messages to standard output. -r MODULE --require MODULE Require MODULE before executing rakefile. -s --silent Like --quiet, but also suppresses the 'in directory' announcement. -t --trace Turn on invoke/execute tracing, enable full backtrace. -v --verbose Log message to standard output (default). --rules Trace the rules resolution. SEE ALSO
ruby(1) make(1) http://rake.rubyforge.org/ REPORTING BUGS
Bugs, features requests and other issues can be logged at <http://onestepback.org/redmine/projects/show/rake>. You will need an account to before you can post issues. Register at <http://onestepback.org/redmine/account/register>. Or you can send an email to the author. AUTHOR
Rake is written by Jim Weirich <jim@weirichhouse.org> UNIX
November 7, 2012 UNIX
All times are GMT -4. The time now is 02:23 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy