changing ownership of files within a bash script

Question

I have this bash script which outputs the first two files as owned by user, and the next three as owned by root:

##################################################
# Variables
NUM="6"     #number of backup files to keep
LOGFILE="/home/boudiccas/cron/obnam-ls.txt"
####################################################

# Change into new directory
cd /home/boudiccas/cron/obnam/

# Generate new file and save it
sudo -u boudiccas obnam ls>"obnamhome-ls-$(date +%Y-%m-%d).txt"

sudo -u boudiccas obnam --config=/etc/obnam-back4.conf ls>"obnamback4-ls-$(date +%Y-%m-%d).txt"

obnam --config=/etc/obnametc.conf ls>"obnametc-ls-$(date +%Y-%m-%d).txt"

obnam --config=/etc/obnamusr.conf ls>"obnamusr-ls-$(date +%Y-%m-%d).txt"

obnam --config=/etc/obnamvar.conf ls>"obnamvar-ls-$(date +%Y-%m-%d).txt"

# Delete old backups!
find /home/boudiccas/cron/obnam -type f -mtime +$NUM -name 'obnamhome-ls-*.txt' -exec rm -v {} + >>$LOGFILE 2>&1

find /home/boudiccas/cron/obnam -type f -mtime +$NUM -name 'obnamback4-ls-*.txt' -exec rm -v {} + >>$LOGFILE 2>&1

find /home/boudiccas/cron/obnam -type f -mtime +$NUM -name 'obnametc-ls-*.txt' -exec rm -v {} + >>$LOGFILE 2>&1

find /home/boudiccas/cron/obnam -type f -mtime +$NUM -name 'obnamusr-ls-*.txt' -exec rm -v {} + >>$LOGFILE 2>&1

find /home/boudiccas/cron/obnam -type f -mtime +$NUM -name 'obnamvar-ls-*.txt' -exec rm -v {} + >>$LOGFILE 2>&1
########################################################################

How can i get the last three files to be owned by user through the script please?

Solution

To change ownership of a file, you can use chown, this way :

chown newuser myfile

or, if you want to change group as well :

chown newuser:newgroup myfile

In your case, you can also change your 3 last lines to add sudo -u boudiccas before obnam ..., it should do the trick.

Comments

[Levans]

@user205787 and what is preventing from adding some chown commands in your script ?

[boudiccas]

You were right Levans, chowning did all that I wanted, nice and simply and easily. Thanks.