Problems with variable expansion on Linux shell

Question

I have a problem with the expansion of my variables in the next script:

fecha="$(date +'%d.%m.%Y')"
bkfile=$bkpath"backup_"$fecha".tar.gz"
tempfile="/tmp/Backup_"$fecha".tar.gz"
declare -a commandlist=(
'tar -pczf $tempfile /tmp/MyBackup/*'
'mv $tempfile $bkfile'
)
for command in "${commandlist[@]}"
do 
    echo $command
done

It´s shows me:

tar -pczf $tempfile /tmp/MyBackup/*
mv $tempfile $bkfile

and I need that the variable are expanded.

Could anyone help me with this problem?

Akhilesh Singh · Accepted Answer · 2014-01-15 13:39:47Z

1

Change the single quote to double quote

'tar -pczf $tempfile /tmp/MyBackup/*'
'mv $tempfile $bkfile'

to

"tar -pczf $tempfile /tmp/MyBackup/*"
"mv $tempfile $bkfile"

edited Jan 15, 2014 at 13:39

answered Jan 15, 2014 at 13:34

Akhilesh Singh

2,5961 gold badge15 silver badges10 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

tripleee Over a year ago

The wildcard still won't be expanded if you attempt to run this as a command. Fortunately, tar can simply accept /tmp/MyBackup as an argument. (See also BashFAQ re: storing commands in variables, though.)

Collectives™ on Stack Overflow

Problems with variable expansion on Linux shell

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related