Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Concatenating awk fields with variable

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Concatenating awk fields with variable
# 1  
Old 09-09-2013
Concatenating awk fields with variable
Hi,

I am trying to do this:-
Code:
FILE=application.log
PID=12345

FILE=`echo $FILE | awk -F "." '{print $1 "$PID" $2}'`

echo $FILE
application$PIDlog

I need the output to be application12345.log but I am not sure how to get the $PID variable into the output. I have tried various things but not getting very far!

Any help appreciated!

Many thanks
Simon
Last edited by vbe; 09-09-2013 at 05:32 AM..
# 2  
Old 09-09-2013
Dear Simon.

Try below one, stop using grave accents it's not good way

Code:
akshay@Lenovo-E49:~$ FILE=application.log
akshay@Lenovo-E49:~$ PID=12345
akshay@Lenovo-E49:~$ FILE=$(echo $FILE | awk -F"." -v t=$PID '{print $1t"." $2}')
akshay@Lenovo-E49:~$ echo $FILE
application12345.log

This User Gave Thanks to Akshay Hegde For This Post:
sniper57
# 3  
Old 09-09-2013
Perfect, thanks!
# 4  
Old 09-09-2013
No need for awk. Use your shell's parameter expansion opportunities:
Code:
echo ${FILE%.*}$PID.${FILE#*.}
application12345.log

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Awk: subset of fields as variable with sprint

Dear Unix Gurus, input: A|1|2|3|4|5 B|1|2|3|4|3 C|1|2|3|4|1 D|1|9|3|4|12 output: A_(5);B(3);C(1)|1|2|3|4 D_(12)|1|9|3|4 Details: If $2, $3, $3, $5 are identical, concatenate $1 and associated $NF together in the first field. But I am trying to do the above by passing the identical... (6 Replies)
Discussion started by: beca123456
6 Replies

2. Shell Programming and Scripting

Concatenating(??) shell variable with string

Dear Users, I am writing a for loop in shell (BASH), and am struggling with a very specific detail: SU_DATA=/home/........./su/ for(blah blah blah) { a=1001 b=1002 suop2 $SU_DATA/$a_clean.su $SU_DATA/$b_clean.su op=sum > W1.su } Here, it looks like the variables are... (1 Reply)
Discussion started by: martm
1 Replies

3. Shell Programming and Scripting

awk sort based on difference of fields and print all fields

Hi I have a file as below <field1> <field2> <field3> ... <field_num1> <field_num2> Trying to sort based on difference of <field_num1> and <field_num2> in desceding order and print all fields. I tried this and it doesn't sort on the difference field .. Appreciate your help. cat... (9 Replies)
Discussion started by: newstart
9 Replies

4. Shell Programming and Scripting

awk processing of variable number of fields data file

Hy! I need to post-process some data files which have variable (and periodic) number of fields. For example, I need to square (data -> data*data) the folowing data file: -5.34281E-28 -3.69822E-29 8.19128E-29 9.55444E-29 8.16494E-29 6.23125E-29 4.42106E-29 2.94592E-29 1.84841E-29 ... (5 Replies)
Discussion started by: radudownload
5 Replies

5. Shell Programming and Scripting

awk - compare 1st 15 fields of record with 20 fields

I'm trying to compare 2 files for differences in a selct number of fields. When differnces are found it will write the whole record of the second file including appending '|C' out to a delta file. Each record will have 20 fields, but only want to do comparison of 1st 15 fields. The 1st field of... (7 Replies)
Discussion started by: sljnk
7 Replies

6. Shell Programming and Scripting

How to print 1st field and last 2 fields together and the rest of the fields after it using awk?

Hi experts, I need to print the first field first then last two fields should come next and then i need to print rest of the fields. Input : a1,abc,jsd,fhf,fkk,b1,b2 a2,acb,dfg,ghj,b3,c4 a3,djf,wdjg,fkg,dff,ggk,d4,d5 Expected output: a1,b1,b2,abc,jsd,fhf,fkk... (6 Replies)
Discussion started by: 100bees
6 Replies

7. Shell Programming and Scripting

awk print variable then fields in variable

i have this variable: varT="1--2--3--5" i want to use awk to print field 3 from this variable. i dont want to do the "echo $varT". but here's my awk code: awk -v valA="$varT" "BEGIN {print valA}" this prints the entire line. i feel like i'm so close to getting what i want. i... (4 Replies)
Discussion started by: SkySmart
4 Replies

8. Shell Programming and Scripting

Concatenating lines ending with '+' using awk

Hi, I have an ASCII text file where some of the lines are ending with '+' character. I have to concatenate the next successive line with those lines having the trailing '+' char by removing that char. The below awk code has some problems to do this task: awk '{while(sub(/\+$/,"")) {... (12 Replies)
Discussion started by: royalibrahim
12 Replies

9. Shell Programming and Scripting

awk sed cut? to rearrange random number of fields into 3 fields

I'm working on formatting some attendance data to meet a vendors requirements to upload to their system. With some help on the forums here, I have the data close. But they've since changed what they want. The vendor wants me to submit three fields to them. Field 1 is the studentid field,... (4 Replies)
Discussion started by: axo959
4 Replies

10. UNIX for Dummies Questions & Answers

concatenating string and variable

how to concatenate a string and variable like a=rahul and i want to put it into another variable 'b' as "rahul_prasath" i dont want to use another variable for "_prasath" how to do it? (1 Reply)
Discussion started by: rolex.mp
1 Replies
Login or Register to Ask a Question