I am new to shell script, I am trying to create multiple directories using script at specific locations.i have no idea about that, i am giving here what i have tried so far ,
directory_name="/home/usw9bls7/lib1"
if [ -d $directory_name ]
then
echo "Directory already exists"
else
mkdir $directory_name
fi
I have to create directory at locations
"/home/usw9bls7/config1"
"/home/usw9bls7/DNQ/lib1"
"/home/usw9bls7/DNQ/config1"
Plesae help
Don't use "if" statements for such simple task, use "-p, --parents" of mkdir to create several directories that doesn't exist and ignore existing ones.
Combine that capability using metacharacters to expand subfolders creations.
In this example I've created the next structure with one command:
-/home
|---/usw9bls7
|------- DNQ
|---- lib1
|---- config1
user@DESKTOP-RR909JI ~
$ mkdir -p /home/usw9bls7/DNQ/{lib1,config1}
user@DESKTOP-RR909JI ~
$ ls -ltr /home/usw9bls7/DNQ/
total 0
drwxr-xr-x+ 1 user user 0 jun. 29 20:17 lib1
drwxr-xr-x+ 1 user user 0 jun. 29 20:17 config1
None of these directories existed before in my environment (except for /home). Anyway if you want to create the script try simplifying things with this.
/home folder? GaspUsing brace expansion if you use bash:
directory_name="/home/usw9bls7/lib1"
if [ -d "$directory_name" ];then
echo "Directory already exists"
else
mkdir -p /home/usw9bls7/{config1,DNQ/lib1,DNQ/config1}/"$directory_name"
fi
Example: with echo command.
echo /home/usw9bls7/{config1,DNQ/lib1,DNQ/config1}
/home/usw9bls7/config1 /home/usw9bls7/DNQ/lib1 /home/usw9bls7/DNQ/config1
fi' ./test.sh: line 8: fi'
echo $SHELL and try adding #!/bin/bash to first line of your script.Portable POSIX solution (works in /bin/ksh, /bin/sh, and /bin/bash)
#!/bin/sh
parent_directory="/home/usw9bls7/lib1"
for directory_name in config1 DNQ/lib1 DNQ/config1
do
if [ -d "$parent_directory/$directory_name" ]
then
echo "Directory already exists"
else
mkdir -p "$parent_directory/$directory_name"
fi
done
This merely loops over your given names and then makes them. I added the -p option so that it will silently create missing parents like DNQ as needed.
Note that if these exist as files rather than directories, you'll get errors from mkdir. At least you'll get something.
Pass them all to mkdir -p:
mkdir -p \
"/home/usw9bls7/config1" \
"/home/usw9bls7/DNQ/lib1" \
"/home/usw9bls7/DNQ/config1"
If you're super performance-conscious, you can test them for existence from the shell first. Here's what I'm doing in my shell lib:
all_eh()
{
local predic a; predic=$1; shift
for a; do
$predic "$a" || return 1
done
}
mkdir_p() { all_eh 'test -d' "$@" || mkdir -p "$@"; }
This is faster if all the directories exist because test (or [ ) is a shell builtin (in practically all shells) and so doesn't cost you the usual 1-2ms fork/exec overhead.
mkdirto create missing intermediate directories.