1. UNIX for Dummies Questions & Answers

Hi all, My boss wants me to find out how often e-m users are accessing their account:confused:. The mail server keeps log of all logins. I want to use grep the 'usernames', but it should come out the moment it first encounters the username in the log. Can I do that? I want to avoid 10+ greps... (2 Replies)

2. UNIX for Dummies Questions & Answers

Hello every one, I have read a little about SED and GREP but I do not know how to do this: Using SED or GREP: "reverse all three letter words" "replace the last two digits in any string of digits by zeros (0)" "remove lines that start and end with the same word" and I have more like... (5 Replies)

3. UNIX for Dummies Questions & Answers

I have the data file: A 1 2 3 BBB 4 5 6 A 7 8 9 I want to grep "A" then-skip a line-then-add two sublines: I my command: grep +3 "A" datafile (8 Replies)

4. UNIX for Dummies Questions & Answers

Hi, Is it possible to display a specific number of lines starting from a line having a particular text using grep command? e.g. I have a text file with the contents below: AAA BBB CCC DDD EEE FFF I want to display 3 lines starting with the line having "BBB" to get the result below:... (11 Replies)

5. UNIX for Dummies Questions & Answers

Hello All, 1.) I am searching for ".exe" in a text file 2.) I need to search for a hexadecimal entree of at least four digits (8 Replies)

6. Shell Programming and Scripting

Hello All, I have few of questions related to Grep given below: 1. Like Perl, is it possible in Grep to negate characters in square brackets. For example in Perl, if '^' is used inside '' then it acts as a negation characters. Can same be achieved through Grep's regular expression. 2. How... (9 Replies)

7. Shell Programming and Scripting

This post was previously mistaken for homework, but is actually a small piece of what I working on at work. Please answer if you can. QUESTION1 How do you grep only an exact string. I am using Solaris10 and do not have any GNU products installed. Contents of car.txt CAR1_KEY0 CAR1_KEY1... (2 Replies)

8. UNIX for Dummies Questions & Answers

I have different things that I was trying to do but am kind of struggling with this since I'm a Linux noob. The backround is that I have two files with student names in the same directory, and each file lists the student name, their major and their grade level. What is the most efficient way to... (6 Replies)

9. Shell Programming and Scripting

Hi. I have a txt file. I need to make a copy of the lines which are beginning with a mobile phone number, or a fix phone number. I have to copy thoose lines in numbers.txt, after that i have to delete then from the originally file. In numbers.txt i need to write a prefix before each number. if the... (1 Reply)

10. Homework & Coursework Questions

1. The problem statement, all variables and given/known data: So i'll probably get told off for this but I have a few problems and rather than clog up the whole forum I'll post them here. Please bare in mind I am a complete novice when it comes to all this and so if you help please treat me like a... (4 Replies)