List folders with numbers in from using bash script

NevemTeve · 03-27-2018, 03:21 PM

> For my knowledge i think i will cd to folderx and then run the command to show all folders...

Now that is a good idea. You might even start a subshell (using parentheses):

Code:

(cd /folderx; insertcommandshere)

The 'cd' in the subshell doesn't affect the main shell.

bmxakias · 03-27-2018, 03:23 PM

Is it better to use it with the trailing slash?

Code:

Where=/folderx; ls -1t "$Where/" | while read -r F; do test -d "$Where/$F" && echo "$F"; done | cat -n

or

Code:

Where=/folderx/; ls -1t "$Where" | while read -r F; do test -d "$Where$F" && echo "$F"; done | cat -n

NevemTeve · 03-27-2018, 03:35 PM

I think these two do the same thing.

bmxakias · 03-27-2018, 03:37 PM

Ok thank you very much !!!!

I will continue with that script now

MadeInGermany · 03-28-2018, 10:32 AM

A variant with cd; do it in a (sub shell) if you want the current work dir unchanged.
A variable num obsoletes the cat -n

Code:

(num=0; cd /folderx && ls -t | while IFS= read -r F; do test -d "$F" && echo "$((num+=1)) $F"; done)

MadeInGermany · 03-28-2018, 10:43 AM

Quote:

Originally Posted by bmxakias

Is it better to use it with the trailing slash?

Code:

Where=/folderx; ls -1t "$Where/" | while read -r F; do test -d "$Where/$F" && echo "$F"; done | cat -n

or

Code:

Where=/folderx/; ls -1t "$Where" | while read -r F; do test -d "$Where$F" && echo "$F"; done | cat -n

The second requires /folderx to be a folder. Will give error if it happens to be an existing file.

bmxakias · 03-28-2018, 01:20 PM

ok i am using the:

Code:

Where=/folderx/; ls -1t "$Where" | while read -r F; do test -d "$Where$F" && echo "$F"; done | cat -n

and i am getting an output like:

Code:

1 folder123
2 folder9584958
3 folderelse

So if i select for example 2 how should i get the name of the folder to create a variable for it?

I am using:

Code:

   read answer
   case "$answer" in
     1) 
    
     2)

     3)

Thank you

NevemTeve · 03-28-2018, 11:33 PM

Maybe you could store the filenames in a bash-array. Read 'man bash' for details. Also here's some basics:

Code:

declare -a Files
Files=(*c)
echo ${#Files} # number of elements
echo ${Files[0]} # first element
for i in "${Files[@]}"; do printf '%s\n' "$i"; done # all elements

bmxakias · 03-29-2018, 07:27 AM

Doesn't sound very easy for me

I will wait for an easier solution or a sample if anyone can help..

Thanks for your reply....

NevemTeve · 03-29-2018, 07:40 AM

Maybe you could consult your teacher, explaining them that this homework assignment is not suitable for your knowledge-level.

bmxakias · 03-29-2018, 12:47 PM

I am not a student

I am too old for that i think

I am just try to create a script that will automate some jobs for me and in fact all are ready and i only miss that part above....

If i don't find any solution i will bypass that part and i will set a variable for it that i have to fill before use it and problem solved

But i really like to learn a solution for this as it may help in future...

Thank you

keefaz · 03-29-2018, 02:59 PM

Maybe select would be appropriate?

Code:

select dir in $(ls -1td /folderx/*/|sed 's/\/*$//');do 
    echo $dir; 
done

Combine this with case statements and it should be done

Some help pages

Code:

help select
help case

http://tldp.org/LDP/Bash-Beginners-G...ect_09_06.html

bmxakias · 03-29-2018, 04:00 PM

Yes that seems to work also

The only issue is that the output is like:

Code:

1) /folderx/folder1
2) /folderx/folder2
3) /folderx/folder3

and my target is to not have the full path as output and get only the last folder name like:

Code:

1) folder1
2) folder2
3) folder3

Any help on that please?

Thank you

keefaz · 03-29-2018, 04:46 PM

Yes, one way to do it:

Code:

select dir in $(ls -1td /folderx/*/| awk -F/ '{print $(NF-2)}'; do
...

bmxakias · 03-30-2018, 04:11 AM

Thanks for your reply.

A parenthesis was missing at the end that i add:

Code:

select dir in $(ls -1td /folderx/*/| awk -F/ '{print $(NF-2)}'); do

but the result using this command is to list the folderx itself repeated like:

Code:

1) folderx
2) folderx
3) folderx

and not the contents of the folderx by date