Help me with mkdir command

Shell Programming and Scripting
1

Hi, please help me with this small script

#!/bin/sh 

curdir=`pwd`
n20=$curdir'/n20/'
msat=$curdir'/n20/msat/'

if [ ! -d $n20 ]
   then
   mkdir $n20
fi

if [ ! -d $msat ]
   then
   mkdir $msat
fi

for a in 30 40 50 60 70 80
do
    $aa=$msat'a'$a
    mkdir $aa
done

The ouput is

I don't understand what I am missing.

When I replace "mkdir $aa" with "echo $aa". I get the output like this:

Why there is 'not found' here? How should I correct it? Could you please explain for me?

2

Try this for last for loop should be

for a in 30 40 50 60 70 80
do
    aa=${msat}a${a}
    mkdir $aa
done

The $aa should be aa only

3

The same error as mine.

This will create the folder with name "aa". I want to create folder a30, a40,...

4 
#!/bin/ksh
curdir=`pwd`
n20=$curdir/n20
msat=$curdir/n20/msat
if [ ! -d "$n20" ]
then
   mkdir "$n20"
fi
if [ ! -d $msat ]
then
   mkdir $msat
   if [ $? -ne -0 ]
   then
      echo "Failed mkdir $msat"
   fi
fi
for a in 30 40 50 60 70 80
do
   aa=${msat}/a"$a"
   mkdir -p $aa
  if [ $? -ne -0 ]
   then
      echo "Failed mkdir $aa"
  fi

done
1 Like
5

Thanks a lot :slight_smile: