CODEWITHSUNDEEP
shellunixscripting
Blue42
Blue42

Reputation: 139

Is this syntactically correct for Unix Shell Script?

I want to replace the 20140118 with $DATE in "Personal_20140118D_1.zip"

is "Personal_"$DATE"D_1.zip" syntactically correct?

DATE=date +%Y%m%d

if [ ( $FILE == "Personal_20140118D_1.zip" ) -a ( $TODAY == "Sat" ) ]; then

..... ... .

Upvotes: 0

Views: 38

Answers (2)

l0b0
l0b0

Reputation: 58838

To replace the first occurrence of the date in the variable:

date_file=${FILE/20140118/$DATE}

See man bash for details.

Example:

$ date=`date +%Y%m%d`
$ file="Personal_20140118D_1.zip"
$ date_file=${file/20140118/$date}
$ echo "$date_file"
Personal_20140123D_1.zip

Upvotes: 1

Aaron Digulla
Aaron Digulla

Reputation: 328624

Yes. Quotes only protect spaces from becoming word separators. You can have them in any place. So these are all equivalent as long as a and b don't contain spaces:

ab
"a"b
"a""b"
a"b"
a"$var"b
a${var}b

I suggest to use "a${var}b", though since the other forms look confusing.

Upvotes: 1

Related Questions