Bash scripting: detect first day of month

Question

I wrote three bash files:

Now I want another bash script do the following :

if (date is the start of month 1/-/----)
then     
    invoke `full_back_up`
else
    invoke `incremental_backup`

How can I write this script?

score 14 · Accepted Answer · answered Nov 03 '10 at 08:39

14

Don't do this. Instead use two separate cron jobs to invoke your tasks.

15 5 1 * * scripts/full_back_up
15 5 2-31 * * scripts/incremental_backup

answered Nov 03 '10 at 08:39

I do this to mark backups as "yearly", "monthly", "daily" in file name and then I delete with `find` command. Is this wrong for some reason? – Kamil Dec 14 '22 at 02:10

user9517 · Answer 2 · 2010-11-03T10:10:18.240

9

Try

if [ `date +%d` != "01" ] 
then
    incremental_backup
else
    full_backup
fi

edited Nov 03 '10 at 10:10

answered Nov 03 '10 at 08:46

user9517

Your answer's the same as mine, and earlier, so I deleted mine. You might want to de-capitalise the "I" in your fisrt "if", though! – MadHatter Nov 03 '10 at 10:02
You should leave your answer up. There are quite a lot of duplicate answers on the site. It all adds to the community. – user9517 Nov 03 '10 at 10:14

2 Answers2