Concatenation in awk not working


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Concatenation in awk not working
# 1  
Old 03-01-2013
Concatenation in awk not working

Hello

I want to achieve the following.

However the concatenation is not working
Code:
mv `ls -ltr *myfile*.log|awk '{print $9}'`  `ls -ltr *myfile*.log|awk '{print `date +'%d%m%y%k%M%S'` $9}'`

I tried
Code:
awk '{x=`date +'%d%m%y%k%M%S'` print $x "" $9}'
awk '{x=`date +'%d%m%y%k%M%S'` print x "" $9}'

But nothing is working

Please help me on this

Thanks and Regards
Chetanz
# 2  
Old 03-01-2013
You're just trying to prepend the date to filename?

Code:
date=$(date +'%d%m%y%k%M%S')
for file in *myfile*.log; do
  mv "$file" "${date}${file}"
done

# 3  
Old 03-01-2013
NO backtics in awk, please! And, using nested backtics like in your mv command needs escaping them. That's why backtics are deprecated and users are encouraged to use the $(...) form of command substitution.
In order to get the output of a shell command into an awk variable, you need to use command, pipe, and getline like in
Code:
$ awk '{"date +%d%m%y%k%M%S"|getline x; print x}' file
010313114139

BTW - the way you use the ls -ltr construct is far from optimal and would not fit mv usage, as both invocations may yield multiple files that mv does not handle that way. What's the reason to use it the way you do? Maybe there's other, improved ways to achieve the desired result.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk concatenation issue - SQL generation

Greetings Experts, I have an excel file and I am unable to read it directly into awk (contains , " etc); So, I cleansed and copied the data into notepad. I need to generate a script that generates the SQL. Requirement: 1. Filter and select only the data that has the "mapping" as "direct"... (4 Replies)
Discussion started by: chill3chee
4 Replies

2. Shell Programming and Scripting

Awk: System command not working in awk

Hi, I have around 10 files in a folder in which I want to change the file format from tab(\t) to pipe(|) with some changes in the fields as well. Below is the code, while tmp file is getting generated but move command is not working, please help Following is the code awk -F"\t" '{print... (2 Replies)
Discussion started by: siramitsharma
2 Replies

3. Shell Programming and Scripting

awk help : if then else not working!

Hi All, This code is not working when trying with "else" : Am I missing something, uptime|sed 's/,/ /g' | awk '{ if ($10 >1) { print ( " :: UPTIME GT 1 : ALERT" )} ;else print "OK" }' Getting this error: syntax error The source line is 1. The error context is { if... (4 Replies)
Discussion started by: rveri
4 Replies

4. UNIX for Dummies Questions & Answers

awk for concatenation of column values

Hello, I have a table as shown below. I want to concatenate values in col2 and col3 based on a value in col4. 1 X Y A 3 Y Z B 4 A W B 5 T W A If col4 is A, then I want to concatenate col3 with itself. Otherwise it should concateneate col2 with col3. 1 X Y YY 3 Y Z YZ... (10 Replies)
Discussion started by: Gussifinknottle
10 Replies

5. UNIX for Advanced & Expert Users

Awk expressions working & not working

Hi, Putting across a few awk expressions. Apart from the last, all of them are working. echo a/b/c | awk -F'/b/c$' '{print $1}' a echo a/b/c++ | awk -F'/b/c++' '{print $1}' a echo a/b/c++ | awk -F'/b/c++$' '{print $1}' a/b/c++ Request thoughts on why putting a '$' post double ++... (12 Replies)
Discussion started by: vibhor_agarwali
12 Replies

6. Shell Programming and Scripting

Awk concatenation in different lines

Hi All I have the data as id-number 01 name-id x0 input-id x0 output-id x0 name-id x0 input-id x0 output-id x0 name-id x0 input-id x0 output-id x0 id-number 02 name-id x0 input-id x0 output-id x0 name-id x0 input-id x0 output-id x0 name-id x0 input-id x0 output-id x0 . . I... (4 Replies)
Discussion started by: posner
4 Replies

7. Shell Programming and Scripting

String concatenation not working in a loop

Hi, First post, so I hope someone can help me with this weirdness :) I have a number files with some rows of information I want to extract, at the same time I want to add to a string some details from the file. I have found two different ways of looping over rows in a file, but one method... (5 Replies)
Discussion started by: LostInTheWoods
5 Replies

8. Shell Programming and Scripting

awk not working for me.

Hi All, I have a server.xml file which looks something like. <Connector port="8443" maxHttpHeaderSize="8192" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" enableLookups="false" disableUploadTimeout="true" acceptCount="100"... (2 Replies)
Discussion started by: nua7
2 Replies

9. Shell Programming and Scripting

cannot get logic for concatenation awk

Hello friends, I have a problem in printing an array.. Example if my array line contains 4 elements like following line=0002 , line=202200, line=200002, line= 300313 Now one = sprintf line line line line will concatenate my whole array to one. But I am not sure about the... (7 Replies)
Discussion started by: user_prady
7 Replies

10. Shell Programming and Scripting

Concatenation

What is syntax for String concatenation? I have $1 as directory. $var is some variable value '/' String value. How do I have to concatenate if I have to run utility - util $1 followed by '/' followed by $var There is no space between these three. (2 Replies)
Discussion started by: videsh77
2 Replies
Login or Register to Ask a Question