Reading text file, comparing a value in a line, and placing only part of the line in a variable?


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Reading text file, comparing a value in a line, and placing only part of the line in a variable?
# 1  
Old 08-06-2013
Reading text file, comparing a value in a line, and placing only part of the line in a variable?

I need some help. I would like to read in a text file.

Take a variable such as ROW-D-01, compare it to what's in one line in the text file such as PROD/VM/ROW-D-01 and only input PROD/VM into a variable without the /ROW-D-01.

Is this possible? any help is appreciated.
# 2  
Old 08-06-2013
Do I understand you correctly that you want the entire text file (= ALL lines), with ROW-D-01 removed, assigned to one variable? How many lines does your file consist of? Post a sample input file.
# 3  
Old 08-06-2013
Code:
var1="ROW-D-01"
var2=`sed -n 's/\/'"$var1"'$//p' textfile`

or
Code:
var1="ROW-D-01"
var2=$(while read line; do [ "$(basename "$line")" = "ROW-D-01" ] && dirname "$line"; done <textfile)

Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Extract a part of variable/line content in a file

I have a variable and assigned the following values ***XYZ_201519_20150929140642_20150929140644_211_0_0_211 I need to read this variable from backward and stop read when I get first underscore (_) In this scenario I should get 211 Thanks Kris (3 Replies)
Discussion started by: mkris
3 Replies

2. Shell Programming and Scripting

EXPECT: Assign variable by reading a line of text from a file

Hi All, I have been using a program on windows called AutoKey. My environment at work is Linux and I have been experimenting with expect. Very powerful. I can move my AutoKey scripts to Linux using Expect once I am educated on how to read from a file using Expect. My application would be... (1 Reply)
Discussion started by: quemalr
1 Replies

3. UNIX for Dummies Questions & Answers

Parsing file, reading each line to variable, evaluating date/time stamp of each line

So, the beginning of my script will cat & grep a file with the output directed to a new file. The data I have in this file needs to be parsed, read and evaluated. Basically, I need to identify the latest date/time stamp and then calculate whether or not it is within 15 minutes of the current... (1 Reply)
Discussion started by: hynesward
1 Replies

4. Shell Programming and Scripting

reading line by line from a text file

Hi, I have a text file something like this: 10.10.10.1, ldap, cn=users,dc=example,dc=com ..... ... and many more lines ... ... now i want to read each individual line from the file and assign it to a variable example: the script should read 10.10.10.1 and assign it to a variable say... (3 Replies)
Discussion started by: sunrexstar
3 Replies

5. Shell Programming and Scripting

[Solved] Problem in reading a file line by line till it reaches a white line

So, I want to read line-by-line a text file with unknown number of files.... So: a=1 b=1 while ; do b=`sed -n '$ap' test` a=`expr $a + 1` $here do something with b etc done the problem is that sed does not seem to recognise the $a, even when trying sed -n ' $a p' So, I cannot read... (3 Replies)
Discussion started by: hakermania
3 Replies

6. Shell Programming and Scripting

Insertion New line whilst reading the text file

Hi, For the text file let us say t.txt having the statements as below. filename : t.txt. Contents : This is first string1 This is first string2 This is first string3 The output of the file should have newline. How to introduce the new line so that the output be as follows ... (5 Replies)
Discussion started by: krackjack
5 Replies

7. Shell Programming and Scripting

reading the whole line from a file into a variable

Hi, I am doing : while read line do printf "%s\n" ${line} done <datafile.txt but I am not getting each single line from the data file assigned to the variable line (but only tokens/fields at a time). I also tried while IFS= read -r lineI want the whole line assigned or read into the... (2 Replies)
Discussion started by: shri_nath
2 Replies

8. Shell Programming and Scripting

Reading data from a specific line in a text file

hello, I have got the following problem that I am hoping someone can help with please. 1. I have got the following text file (below) , the columns data are 'Test Day', 'Board', 'Betting Number'. TEXT FILE ============================================ 1 3 02-01-27-28-29-30 0 1... (1 Reply)
Discussion started by: jermaine4ever
1 Replies

9. Shell Programming and Scripting

reading text file line by line

Ok. before anyone mentions it, I did search for this but I'm not sure if I am looking for the right thing. Now, onto my issue. I have been keeping vmstats output in running text files. So I have a file that looks like this: vmstat 2 5 2005.09.19 kthr memory page ... (6 Replies)
Discussion started by: MizzGail
6 Replies
Login or Register to Ask a Question