Select max value based on filename

Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Select max value based on filename
# 1  
Old 07-13-2011
Select max value based on filename

Hi, I would just like to know how to get the file with the max filename on a directory and get rid of all the others. For example, in directory A:/ i have the ff files:


what I want to get is the max in files whose filenames start with APPLE*, hence, my expected result is APPLE2003. Then, when I get this file, how would I rename it to say, FINALAPPLE? And remove all files starting with APPLE*?

# 2  
Old 07-13-2011
FileName=`ls -lrt APPLE* | awk '{print $9}' | sort -nr | head -1`
echo $FileName
#test the above output and if you satisified then uncomment the below one
#mv $FileName FINALAPPLE && rm -rf APPLE* || echo "Move is not success"

# 3  
Old 07-13-2011
Thanks, itkamaraj. This is working perfectly. Smilie

---------- Post updated at 11:59 PM ---------- Previous update was at 11:22 PM ----------

oh, one more thing, what's the use of awk '{print $9}'?
# 4  
Old 07-13-2011
just execute ls -lrt APPLE*

and execute ls -lrt APPLE* | awk '{print $9}'

you will get to know the difference

actually, we are extracting only the filenames (9th column) from the ls -lrt output
# 5  
Old 07-13-2011
ok..I get it now.. Smilie Thanks again!
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Filter Row Based On Max Column Value After Group BY

Hello Team, Need your expertise on following: Here is the set of data: C1|4|C1SP1|A1|C1BP1|T1 C1|4|C1SP2|A1|C1BP2|T2 C2|3|C2SP1|A2|C2BP1|T2 C3|3|C3SP1|A3|C3BP1|T2 C2|2|C2SP2|A2|C2BP2|T1 I need to filter above date base on following two steps: 1. Group them by column 1 and 4 2.... (12 Replies)
Discussion started by: angshuman
12 Replies

2. UNIX for Dummies Questions & Answers

Select last update data based on file name

Hi All, I need to remove all files except the most update data based on date on filename Input data_AIDS_20150312.txt data_AIDS_20150311.txt data_AIDS_20150411.txt data_AIDS_20140312.txt the most updated data is data_AIDS_20150411.txt, so I'll remove other files. My expected output... (3 Replies)
Discussion started by: radius
3 Replies

3. Shell Programming and Scripting

Select lines from a file based on a criteria

Hi I need to select lines from a txt file, I have got a line starting with ZMIO:MSISDN= and after a few line I have another line starting with 'MOBILE STATION ISDN NUMBER' and another one starting with 'VLR-ADDRESS' I need to copy these three lines as three different columns in a separate... (3 Replies)
Discussion started by: Tlcm sam
3 Replies

4. UNIX for Dummies Questions & Answers

How to select files based on a criteria?

I have a file..... xxx 2345 455 abc 345 555 cdf 456 777 fff 555 888 Now my requirement is, Say if, i want to select only those records prior to the record fff 555 888... how do i go about doing this in unix.... The fff would be hardcoded as it wud be fixed and everytime when i... (7 Replies)
Discussion started by: saggiboy10
7 Replies

5. Shell Programming and Scripting

Finding max number in filename and opening it

Hi, I have files named as energy.dat.1 energy.dat.2 energy.dat.3 ... energy.dat.2342 I would like to find the file with maximum number in the filename (ex. energy.dat.2342) and open it. Would you please share your expertize in writing the script? Thanks in advance. (8 Replies)
Discussion started by: rpd25
8 Replies

6. Shell Programming and Scripting

Select record with MAX value in MySQL

Hi there, I have trouble selecting record that contain one biggest value for a group of other values. I mean, this is my table: mysql> SELECT * FROM b; +----+------+-------+ | id | user | value | +----+------+-------+ | 1 | 1 | 100 | | 3 | 1 | 150 | | 5 | 1 | 300 | | 6... (20 Replies)
Discussion started by: chebarbudo
20 Replies

7. Shell Programming and Scripting

select values based on keys

HI The input 1st column has specific keys like 1 with value a,b and c. 2 with b,b,d and 3 with a,a a. when ever c appears as one of the values the result will be key ........ c (You can see in the out put as 1 w...... 6.... c) and same follows for d. Thanx:) I'm learning awk scripting. If... (3 Replies)
Discussion started by: repinementer
3 Replies

8. Shell Programming and Scripting

Insert comma based on max number of column

Hi, I am new to unix shell shell scripting. I have a specific requirement where I need to append comma's based on the max number of column in the file. Eg: If my source file look something like this, sengwa,china tom,america,northamerica smith,america walter My output file... (8 Replies)
Discussion started by: nicholas_ejn
8 Replies

9. Shell Programming and Scripting

Select Record based on First Column

Hi, I have a file with multiple records...and I have to select records based on first is the sample file... I01,abc,125,1a2,LBVI02 I01,abc,126,2b5,LBVI02 I02,20070530,254,abc,LLBI01 I02,20070820,111,bvd,NGBI01 I need all records with I01 in first field in one file and... (8 Replies)
Discussion started by: mgirinath
8 Replies

10. Shell Programming and Scripting

Select a portion of file based on query

Hi friends :) I am having a small problem and ur help is needed... I have a long file from which i want to select only some portions after filtering (grep). My file looks like : header xxyy lmno xxyy wxyz footer header abcd xy pqrs footer . . (14 Replies)
Discussion started by: vanand420
14 Replies
Login or Register to Ask a Question