grep command & shell procedure's

Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers grep command & shell procedure's
# 1  
hello, i'm trying to pluck words from a list that have exactly 3 occurances of a specified letter. I've come up with this :
grep -i .*$1.*$1.*$1.*
But this also selects words with 4 or more, any tips?

I'm putting this into a shell procedure and want to be able to add a switch before I put the letter to searched in ($1), if you could point me to the correct manual page to read up on that it would be great, I'm using bourne shell.

Thanks in advance

# 2  
Try using a ? instead of the * The ? is for only one character place where as * is for multiple. I think this is will work in scripts also. (Haven't written any scripts yet)

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #976
Difficulty: Medium
In April 2014, Linus Torvalds banned Kay Sievers from submitting patches to the Linux kernel for failing to deal with bugs that caused systemd to negatively interact with the kernel.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

applescript & grep - sed command

I'm new using Unix commands in applescript. The following script you choose different folders with PDfs, get file count of PDfs on chosen folders, & write the results in text file. set target_folder to choose folder with prompt "Choose target folders containing only PDFs to count files" with... (0 Replies)
Discussion started by: nellbern
0 Replies

2. UNIX for Dummies Questions & Answers

Grep char count & pipe to sed command

Hi I am having a 'grep' headache Here is the contents of my file: (PBZ,CP,(((ME,PBZ,BtM),ON),((ME,((PBZ,DG),(CW9,PG11))),CW9,TS2,RT1))) I would like to count out how many times 'PBZ' occurs and then place that number in the line above 3... (8 Replies)
Discussion started by: cavanac2
8 Replies

3. UNIX for Dummies Questions & Answers

VI 'go to position #' command

I apologize is this is somewhere else but I did look.... Is there a command to goto position # x within the VI editor? I've seen where you can search for a particular char string but I need to go to position 200 within a record (tired of counting positions)...:) Thanks in advance... (2 Replies)
Discussion started by: hedrict
2 Replies

4. Shell Programming and Scripting

grep doesn't work within shell script?

I am trying to run the following code from a script file but it complains that syntax of (both instances of) grep is wrong. When I copy and paste it to the terminal, it is OK. Any idea what the problem might be? set i = `grep -c #define flags.h` while ($i>20) @ i-- my func (`cat... (4 Replies)
Discussion started by: barisgultekin
4 Replies

5. UNIX for Dummies Questions & Answers

What is with the '&'.

Hi Gurus, I would appreciate if someone could enlighten this newbie as to how significant the '&' is to unix. Currently I am getting around to writing a script which has to deal with a lot of these ampersands either as starting chars or between chars. Please find below the simpliest way that I... (4 Replies)
Discussion started by: buRst
4 Replies

6. Shell Programming and Scripting

Clearify what it means under 'WHAT' when hit the 'w'-command

I wonder how I shall read the result below, especially 'what' shown below. The result was shown when I entered 'w'. E.g what is TOP? What is gosh ( what does selmgr mean?)? login@ idle JCPU PCPU what 6:15am 7:04 39 39 TOP 6:34am 6:45 45 45 TOP 6:41am ... (1 Reply)
Discussion started by: Aelgen
1 Replies

7. UNIX for Dummies Questions & Answers

'find' command question

my solaris text talks about the 'find' command... it further goes to talk about an "action" used with the find command. I am completely confused as to what the {} do with the find comand. the explanation is this: "A set of braces, {}, delimits where the file name is passed to the command from... (2 Replies)
Discussion started by: xyyz
2 Replies

8. UNIX for Dummies Questions & Answers

what is the 'whatis' command?

I am kind of new with Unix and I really need some help. Can you please tell me what the 'whatis' command is? and what does it do? Let's say that I have a file which I want to delete, what command will I need to use? If I have a directory that I want to delete all files from what command do... (11 Replies)
Discussion started by: mischiefdemon
11 Replies

9. UNIX for Dummies Questions & Answers

sed 's/~/\^J/g' how to get "^J" on same line as rest of the command.

when ever i type it in it always looks like so echo $file | sed 's/~/\ /g' how can i get it on one line? (6 Replies)
Discussion started by: Optimus_P
6 Replies

10. UNIX for Dummies Questions & Answers

How to subtract 2 hours from 'date' in shell ( /bin/sh ) script ?

I write a sh script that zip and copy to tape all files that older then 2 hours. 1. The way I choose is - touch a file with "now - 2 hours", then use fine with '! -newer' 2. Do you have any other idea to do it ? tnx. (1 Reply)
Discussion started by: yairon
1 Replies

Featured Tech Videos