How to timestamp data copied into a postgresql database - database

Question

I have a shell script pulling data from a server into a postgresql table.
df -g | awk 'BEGIN{OFS=","}NR>1{$1=$1; print}' > /data/metric.csv
psql -h localhost -d metrics -U postgres -c "copy tablename from STDIN with delimiter as ',';" < /data/metric.csv
Displays as:
filesystem | gb_blocks | free | %used | iused | %iused | mounted_on
/dev/hd2 | 16.75 | 12.60 | 25% | 79098 | 3% | /usr
/dev/hd9var | 8.00 | 6.00 | 25% | 11965 | 1% | /var
/dev/hd3 | 36.75 | 18.83 | 49% | 5614 | 1% | /tmp
/dev/hd1 | 3.25 | 3.11 | 5% | 674 | 1% | /home
/dev/hd11admin | 0.25 | 0.25 | 1% | 16 | 1% | /admin
/proc | - | - | - | - | - | /proc
I'm working with Postgresql on an Ubuntu OS and pulling the info from an AIX server. I'd like to add a column with a timestamp for every time new data is added to the table because right now it just all blends together. I've tried to add another column for timestamp and give it a timestamp value but the timestamp isn't in the csv file and I'm not sure how to add it either. I appreciate an help I can get to solve this.

Answer 1

Create table and add date column with Default value like current_Date/now() ).
CREATE TABLE IF NOT EXISTS metrics
(
filesystem text ,
gb_blocks text ,
free text ,
per_used text ,
iused text ,
per_iused text ,
mounted_on text ,
load_dttm timestamp without time zone DEFAULT now()
);
mention columnswith table while loading data as below command
psql -h localhost -d metrics -U postgres -c "copy metrics(filesystem,gb_blocks,free,per_used,iused,per_iused,mounted_on) from STDIN with delimiter as ',';" < /data/metric.csv