Regarding string manipulation and ls in unix shell script

[vind123]

I have a string

1. str1=topasa1
i want to store it in another string str2 as
str2=asa1
How do i do it in unix shell script

2. when i do a ls -ltr
ls -ltr
total 4
-rw-r--r-- 1 scc scc 8 Aug 14 00:46 test1
-rw-r--r-- 1 scc scc 17 Aug 14 00:47 test2

i want the latest file of test* to be stored in a string x1 how do i do it?

x1=ls -ltr test* |......
or
x1 = ls -lt test* |....

how do i get the latest file test2 into x1
i need to get the output as x1=test2

[Peter Godron · Accepted solution]

Hi,

str2=`echo $str1 | cut -c3-`

x1=`ls -tr test? | tail -1`

[vind123]

Thanks a lot for the info. I am getting the below output when i run this command and i am getting the latestfile but i want remove the prefix "/home/users/scc/prodfiles/" in the output and store the test2 in x2 variable.

> ls -tr /home/users/fcc/prodfiles/test* | tail -1
/home/users/fcc/prodfiles/test2

I want the variable x2 to have test2 only
x2=`ls -tr /home/users/fcc/prodfiles/test* | tail -1`|.....

what do i need to do for this one. Also the directory name,path might change. i want to filter the content after final "/" to get the file name

[Peter Godron]

Hi,
please see:
man basename

[vind123]

>ls -tr /home/users/scc/prodfiles/test* | tail -1
/home/users/fcc/prodfiles/test2


I did the below one but i didn't get the output.

ls -tr /home/users/fcc/prodfiles/test* |tail -1 | basename

[Marvin Strong]

You can also just use your x1 variable as

${x1##*/}

that will drop off the path part of the variable. Useful if you want to preserve the path for some reason.

[Peter Godron]

Hi,
x1=`ls -tr /home/users/fcc/prodfiles/test* |tail -1`
x1=`basename $x1`

Also could you review your current threads after reading
http://forums1.itrc.hp.com/service/forums/helptips.do?#28

[spex]

Hi,

# x1=$(basename $(ls -1t /home/users/scc/prodfiles/test* | head -n 1))

PCS

[Will Couillard]

For the first part of your post, if you always are removing the the first three characters of "str1" you can use:

$ str1=topasa1

$ str2=${str1#???}

Then:

$ print str2

to see the result

In this case each "?" removes antoher character from the left. To remove from the right, user "%".

Will

[Will Couillard]

In my last response, line 6 should read

$ print $str2

Sorry,
Will

[vind123]

Thanks a lot for the info