Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Bash 'shopt' doubt
Top Forums Shell Programming and Scripting Bash 'shopt' doubt Post 302247250 by royalibrahim on Wednesday 15th of October 2008 09:11:54 AM
Old 10-15-2008
Bash 'shopt' doubt
Hi,

I am using bash shell's extended pattern matching.
What tweak the following code needs in order to get the expected output?

Code:
shopt -s extglob
f="a@b@_c@d@_e"
echo "${f/@(@|@_)/__}"

My expected output is:
a__b__c__d__e

but the actual output is:
a__b@_c@d@_e
# that is, how to make the change global as like echo $f | sed 's/@\|@_/__/g'
Last edited by royalibrahim; 10-15-2008 at 10:35 AM..
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Bash scripting doubt

i need to check if any user has logged-in more than once in different terminals and then print the count of those login, so i wrote this command, who -H | wc -l but i feel its not accurate , something is wrong ,i have been trying for a long time by trial n error to solve it, but i need... (2 Replies)
Discussion started by: xiphias
2 Replies

2. Shell Programming and Scripting

colors in BASH, doubt with script

I was trying to see all combinations of foreground and background colors in BASH. This works fine for me, echo -e '\E[37;46m TEXT' but when I tried the below script, the variables i and j do not expand. #!/bin/sh for i in `seq 30 37` # foreground do for j in `seq 40... (4 Replies)
Discussion started by: jaduks
4 Replies

3. Shell Programming and Scripting

shopt -s nullglob

Hi, I am using BASH. In a directory there are files that match either of the following 2 patterns: *.L1A_AC* or S*.L1A_MLAC* I would like to write a script that will include a for loop, where for each file in the directory, a certain function will be performed. For example: for FILE in... (4 Replies)
Discussion started by: msb65
4 Replies

4. Shell Programming and Scripting

Doubt??

I jus want to know the meaning of the below command line(exclamation following that re-direction) sqlplus -s `cat /home/sample.txt` <<! Thanks!! (1 Reply)
Discussion started by: nohup
1 Replies

5. UNIX for Dummies Questions & Answers

Doubt

Hi , Struck with one basic question. Iam expecting word count of 4 where "wc" is showing as 5 . # echo "abcd" | wc 1 1 5 # echo abcd | wc 1 1 5 (5 Replies)
Discussion started by: penchal_boddu
5 Replies

6. Shell Programming and Scripting

Bash shell scripting doubt

Hello All, I am setting up a cron job, where i am calling a shell script to make few builds. I got struck at a point, need some expert inputs to proceed further. The script is categorized in 5 parts and in the last part while building software it asks for few questions like:- 1. Build mode... (4 Replies)
Discussion started by: sahil_jammu
4 Replies

7. Red Hat

Doubt

How to create a file with specific size in RHEL6 (1 Reply)
Discussion started by: Sashi Kanth A
1 Replies

8. UNIX for Beginners Questions & Answers

Doubt

in my shell script requirement is to search and replace the file with variable so i use the following command sed -i "s/abc/$SCHEMA/g" table.sql later when the script runs sqlplus username/pwd@Table& this & is not letting the variable to replace the value inside the file .please let me know... (1 Reply)
Discussion started by: bhuvan1
1 Replies

9. UNIX for Advanced & Expert Users

Shopt -s histappend

What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file. # When the shell exits, append to the history file instead of overwriting it shopt -s histappend (3 Replies)
Discussion started by: cokedude
3 Replies

LEARN ABOUT LINUX

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)
All times are GMT -4. The time now is 06:38 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy