Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Store highest filename from ls command to a variable
Top Forums Shell Programming and Scripting Store highest filename from ls command to a variable Post 302467467 by sssccc on Friday 29th of October 2010 12:24:03 PM
Old 10-29-2010
Quote:
Originally Posted by fubaya
Neither sort will work if you get more than 9 files unless the single digit numbers have a 0 before their number (01... 09, etc)
Code:
(examples)
# touch file{1,2,5,10,15,20}.log
# ls *.log| sort -u | tail -1
file5.log
# ls *.log| sort -n | tail -1
file5.log
#

sort -V works, but so does ls -v without the need for sort
Code:
# ls *.log | sort -V | tail -1
file20.log
# ls -v *.log | tail -1
file20.log
#

Thanks fubaya for the clarification.
"ls -u" worked for me as the numbers in the files I am working with have a four digit number that will always stay as four digit. So, I will not have any issues with it. However, it is really good to know to use "ls _V" or "ls -v" to be on the safe side. Curiously, options -v and -V are not documented in the manual pages I get by typing "man sort".

Thanks again. Really appreciate.
Last edited by sssccc; 10-29-2010 at 01:34 PM..
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to Store command O/P to a variable...

Hi all.. I got a problem.. Its easy to redirect o/p to a file.. But Is it possible to redirect the O/P to a variable? For example: I've a command in my script: string1=cut -d ':' -f2 file.txt When I do: echo $string1 The value is empty... Pls suggest me how to store the value... (7 Replies)
Discussion started by: smartbuddy
7 Replies

2. Solaris

NAWK - setting a variable to the highest value

Hi, new to nawk so not sure how this works, I have a file with three values 23:36:18 - i need to set a variable called SCORE with the highest value from the file (i.e. 36) using nawk can anyone help? thanks (1 Reply)
Discussion started by: Pablo_beezo
1 Replies

3. Shell Programming and Scripting

how to store grep command in a Variable

I have a variable A echo $A 5060 I am exporting the value X,Y,Z and it id fetching right thing and When I run C=`${X} -l ${Y} ${Z} "trap '' INT;. ~/.profile >/dev/null 2>/dev/null; netstat -na | grep \$A`" here it is going to same directory and also running netstat -na | grep 5060 ... (4 Replies)
Discussion started by: madhusmita
4 Replies

4. Shell Programming and Scripting

Not able to store command inside a shell variable, and run the variable

Hi, I am trying to do the following thing var='date' $var Above command substitutes date for and in turn runs the date command and i am getting the todays date value. I am trying to do the same thing as following, but facing some problems, unique_host_pro="sed -e ' /#/d'... (3 Replies)
Discussion started by: gvinayagam
3 Replies

5. Shell Programming and Scripting

Using variable to store of find command

Hello Experts I am newbie to unix and writing one script to make archive files Problme i am facing is : I have used find command to find the type of files and I am storing find command results in a variable. When I echo the variable I can see that path is printed properly but when i am... (5 Replies)
Discussion started by: mitsyjohn
5 Replies

6. Shell Programming and Scripting

To store the file name o/p from find command in to a variable

Hi How to use a variable to store the filename of a file which was found by the 'find' command. can this be practical-->var = find . -name "filename.dat" Please help.. (1 Reply)
Discussion started by: ayyappaas
1 Replies

7. Shell Programming and Scripting

store last command exit status in variable in shell script

Hello All My req is to store the exit status of a command in shell variable I want to check whether the file has header or not The header will contain the string DATA_ACQ_CYC_CNTL_ID So I am running the command head -1 $i | grep DATA_ACQ_CYC_CNTL_ID Now I have to check if... (6 Replies)
Discussion started by: Pratik4891
6 Replies

8. Shell Programming and Scripting

How to store the return value of a command into a variable?

I want to store the return value of grep -c string filename into a variable, say count. How do I do that? For example if grep -c "string" "filename" shows 0 on executing it in the sh shell then I want to store this 0 in a variable. Is it possible? :D (5 Replies)
Discussion started by: navienavnav
5 Replies

9. Shell Programming and Scripting

Store command inside variable

Is it possible to store a command inside a variable? i want this piece to be stored inside a variable, so i can use it later in a different command $u | cut -d " " -f 2 var="$u | cut -d " " -f 2" eval $var I tried to use eval but I receive this error: -f 2: command not found ... (5 Replies)
Discussion started by: velos
5 Replies

10. Programming

Python - store output of command to a variable

I am trying to store output of python command in variable. Could you please help how I can do that ? For example I am executing the following command - "CentOS" in server_desc The output would be True or False I would like to store the output in a variable say outPut and use condition... (4 Replies)
Discussion started by: atanubanerji
4 Replies

LEARN ABOUT DEBIAN

nislog

nislog(1M)						  System Administration Commands						nislog(1M)

NAME

       nislog - display the contents of the NIS+ transaction log

SYNOPSIS

       /usr/sbin/nislog [-h num | -t num]  [-v] [directory...]

DESCRIPTION

       nislog  displays  the  contents of the NIS+ server transaction log on the standard output. This command can be used to track changes in the
       namespace. The /var/nis/trans.log file contains the transaction log maintained by the NIS+ server. When updates occur, they are	logged	to
       this  file  and	then  propagated  to replicas as log transactions.  When the log is checkpointed, updates that have been propagated to the
       replicas are removed.

       The nislog command can only be run on an NIS+ server by superuser. It displays the log entries for that server only.

       If directory is not specified, the entire log is searched. Otherwise, only those logs entries that correspond to the specified  directories
       are displayed.

OPTIONS

       -h num	       Display num transactions from the ``head'' of the log. If the numeric parameter is  0, only the log header is displayed.

       -t num	       Display	num transactions from the ``tail'' of the log. If the numeric parameter is  0, only the log header is displayed.

       -v	       Verbose mode.

FILES

       /var/nis/trans.log      transaction log

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWnisu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       nis+(1), rpc.nisd(1M), nisfiles(4), attributes(5)

NOTES

       NIS+  might  not  be  supported in future releases of the SolarisTM Operating Environment. Tools to aid the migration from NIS+ to LDAP are
       available in the Solaris 9 operating environment. For more information, visit http://www.sun.com/directory/nisplus/transition.html.

SunOS 5.10							    12 Dec 2001 							nislog(1M)
All times are GMT -4. The time now is 05:21 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy