how do i put a time stamp in a file name

Shell Programming and Scripting
1

i want to copy a filea.dat to a file name in the format
of filea_yyyymmdd_hhmi.dat

using something like DTSTAMP=$(date "+%Y%m%d"),
which puts it in format filea_yyyymmdd.dat

2 
#!/bin/ksh
# function for renaming
rename()
{
DTSTAMP=$(date "+%Y%m%d")
filename=basename($1)
file=${filename%.dat}
mv $filename $file"$DTSTAMP".dat
}
3

Looks like you already have it.

DATE=$(date +%Y%m%d)
TIME=$(date +%T)

cp filea.dat filea_$DATE.dat

or

cp filea.dat filea_$DATE_$TIME.dat

Hope this helps.

-x96

4

no that did not work. only the HHMM appeared in the file name,

I used

DTSTAMP=$(date "+%Y%m%d")
HMSTAMP=$(date "+%H%M")
cp /fdb/prod/fdbadm/data/nassst115d01.txt /fdb/prod/fdbadm/data/nass/FacilityMaster_$DTSTAMP_$HMSTAMP.dat

file name came out to be FacilityMaster_0732.dat - time only

i then reversed the order and had the time before the date, and then only the date appeared, but not the time.

DTSTAMP=$(date "+%Y%m%d")
HMSTAMP=$(date "+%H%M")
cp /fdb/prod/fdbadm/data/nassst115d01.txt /fdb/prod/fdbadm/data/nass/FacilityMaster_$HMSTAMP_$DTSTAMP.dat

file name became FacilityMaster_20070129.dat

5

Use braces around the variable names

cp /fdb/prod/fdbadm/data/nassst115d01.txt /fdb/prod/fdbadm/data/nass/FacilityMaster_${HMSTAMP}_${DTSTAMP}.dat
6

Use braces around the variable names worked perfectly.