Read in specific lines in a file

Login or Register for Dates, Times and to Reply

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Read in specific lines in a file
# 1  
Read in specific lines in a file

I have a text file

First title line
other lines
other lines
other lines

I want to read in this text file and parse the name1...name4 to a variable. How do I specificially read in these lines and these lines only?
# 2  
var=$(awk '/name[1-4]/' file)

# 3  
  read; read;
  read var1
  read var2
  read var3 
  read var4
} < file

# 4  
Thanks Jotne...but I don't know what name1-4 will be so I don't think that command will work...

Thanks Scrutinizer....could you explain your code? also I won't know how many names there are so how do I terminate the reading until say, it comes to an empty line after the last name? Sorry I misout the detail
# 5  
You need a parameter to look for.
var=$(awk 'NR>1&&NR<6' file)

This takes record 2,3,4,5 into variable
# 6  
@piynik. Is assumed you wanted to put line 3-6 into variables (so it skips the first two lines and then does 4 reads). If not, you would need to be more specific, provide more details.
# 7  
so in that text file, it contains a list of names starting from the 3rd line, of which I don't know how many there will be (different each run), until it ends with an empty line, followed by other lines. let say the next line after the empty line is
 expected_values: 126

So I want to write a loop, something like

while read name
(some operations using $name)
done <textfile.txt

in each cycle of the loop the names are parsed to a variable $name, so name1 in first cycle, name2 in 2nd cycle and so on until it reaches the empty line.

I hope that gives enough detail in what I am trying to do.
Login or Register for Dates, Times and to Reply

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

Test Your Knowledge in Computers #51
Difficulty: Easy
The term 'IoT' means the 'Internet of Tomorrow'.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Quick UNIX command to display specific lines in the middle of a file from/to specific word

This could be a really dummy question. I have a log text file. What unix command to extract line from specific string to another specific string. Is it something similar to?: more +/"string" file_name Thanks (4 Replies)
Discussion started by: aku
4 Replies

2. Shell Programming and Scripting

To read specific line from a file

Hi, I have a ldif file like below: version: 1 dn: cn=Test Group,ou=Applications,dc=xyz,dc=com objectClass: groupOfUniqueNames objectClass: top cn: Test Group uniqueMember: uid=abc,ou=People,o=xyz,o=Corporate,dc=xyz,dc=com dn: cn=Test Sub Group,cn=Test... (4 Replies)
Discussion started by: saurau
4 Replies

3. Shell Programming and Scripting

how read specific line in a file and write it in a new text file?

I have list of files in a directory 'dir'. Each file is of type HTML. I need to read each file and get the string which starts with 'http' and write them in a new text file. How can i do this shell scripting? file1.html <head> <url></url> </head> file2.html <head>... (6 Replies)
Discussion started by: vel4ever
6 Replies

4. UNIX for Dummies Questions & Answers

When reading a csv file, counter to read 20 lines and wait for minute then read next 20 till end

Hello All, i am a newbie and need some help when reading a csv file in a bourne shell script. I want to read 10 lines, then wait for a minute and then do a reading of another 10 lines and so on in the same way. I want to do this till the end of file. Any inputs are appreciated ... (3 Replies)
Discussion started by: victor.s
3 Replies

5. Shell Programming and Scripting

read from a specific pattern from one file and append it to another

Hi! Everyone, Say this file1 -------------- line 1 51610183 420001010 0010CTCTLEDPPOO 2151610183 line 2 2151610183 420001010 0030A2TH2 line 3 2151610183 420001010 0040A2TH3 line 4 2151610183 420001010 ... (0 Replies)
Discussion started by: kinkar_ghosh
0 Replies

6. Shell Programming and Scripting

Substitute specific lines with lines from another file

Hello All, I am new to this forum. I am currently facing a problem in manipulating files. I have two files called old-matter and new-matter # cat old-matter abc: this, is a, sample, entry byi: white board, is white in color rtz: black, board is black qty: i tried, a lot asd: no... (1 Reply)
Discussion started by: rahmathulla
1 Replies

7. UNIX for Dummies Questions & Answers

how to display specific lines of a specific file

are there any basic commands that can display lines 99 - 101 of the /etc/passwd file? I'm thinking use of head and tail, but I forget what numbers to use and where to put /etc/passwd in the command. (2 Replies)
Discussion started by: raidkridley
2 Replies

8. Shell Programming and Scripting

How to read a specific value from a Log file?

Hi, I have a .log file in which it has many values. But i need some specific values. How it can be done using Shell Script. Please explain in detail. Thankx in advance. Sathish D V. (8 Replies)
Discussion started by: cooolthud
8 Replies

9. Programming

How to read specific lines in a bulk file using C file Programming

Please Help me I have a Bulk file containing Hex data I want to read specific lines from that bulk file by ID number. example ID DATE Time data 14 2005/09/28 07:40:08.546 0 5 078B1C 01916C 0FE59C 004B54 0A9670 0D04ED 05B6B4 0E2223... (10 Replies)
Discussion started by: rajan_ka1
10 Replies

10. Shell Programming and Scripting

Shell Script to read specific lines in a file

I have a file with contents as follows Record 1: Rejected - Error on table "DWO"."P2G_CUST_EVENTS". ORA-00001: unique constraint (DWO.CUST_EVENTS_PK) violated Record 5: Rejected - Error on table "DWO"."P2G_CUST_EVENTS". ORA-00001: unique constraint (DWO.CUST_EVENTS_PK) violated Record 6:... (5 Replies)
Discussion started by: varshanswamy
5 Replies

Featured Tech Videos