How do I pass the value of the variable to a command in a bash script?
Specifically, I want to create a AWS S3 bucket with (partially) random name. This is what I got so far:
#!/bin/bash
random_id=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1)
bucket_name=s3://mybucket-$random_id
echo Bucket name: ${bucket_name}
aws s3 mb ${bucket_name}
The output I get:
Bucket name: s3://mybucket-z4nnli2k
Parameter validation failed:cket-z4nnli2k
": Bucket name must match the regex "^[a-zA-Z0-9.\-_]{1,255}$"
The bucket name is generated correctly, but aws s3 mb ${bucket_name}
fails. If I just run aws s3 mb s3://mybucket-z4nnli2k
then the bucket is created, so I assume that aws s3 mb ${bucket_name}
is not the correct way to pass the value of the bucket_name
to the aws s3 mb
command.
It must be something obvious but I have almost zero experience with shell scripts and can't figure it out.
How do I pass the value of bucket_name
to the aws s3 mb
command?
Thanks to the comments above, this is what I got working:
#!/bin/bash
random_id=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1)
bucket_name=s3://mybucket-$random_id
echo Bucket name: ${bucket_name}
aws s3 mb "${bucket_name}"
I also had to run dos2unix
on the script, apparently there were bad line breaks.
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