I have similar different file of the format backup_2016-26-10_16-30-00 is it possible to rename using bash script to backup_26-10-2016_16:30:00 for all files.
Kindly suggest some method to fix this.
Original file:
backup_2016-30-10_12-00-00
Expected output:
backup_30-10-2016_12:00:00
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Answer
To perform only the name transformation, you can use awk:
echo 'backup_2016-30-10_12-00-00' |
awk -F'[_-]' '{ print $1 "_" $3 "-" $4 "-" $2 "_" $5 ":" $6 ":" $7 }'
As fedorqui points out in a comment, awk‘s printf function may be tidier in this case:
echo 'backup_2016-30-10_12-00-00' |
awk -F'[_-]' '{ printf "%s_%s-%s-%s_%s:%s:%sn", $1,$3,$4,$2,$5,$6,$7 }'
That said, your specific Linux distro may come with a rename tool that allows you to do the same while performing actual file renaming.