how to get month last date in unix

Shell Programming and Scripting
1

Hello

I want to get end date of the any month in unix . is there any function to do this.

we can get month from date command 'date +%b'
example:

If Feb month then last date is 28

if sep then last date 30. like this

thanks

please help

2

Try this command
You can include this in a shell script to get the month and year to pass to the below command.

cal 10 05 | grep -v ^$ | tail -1 | sed 's/^.* \([0-9]*\)$/\1/'

3

try this,

cal <month> <year> | sed '/^$/d' | tail -1 | awk '{printf $NF}'

4

not working

please check once again.

thanks

5

Why dont you use the datecalc.

It does exactly what you require.

6

Which solution is not working? Give the last two digits for year

7 
echo $(cal 10 2005) | awk '{print $NF}'
8

cal 10 05 | xargs -n1 | tail -1

9

Note: `cal 10 05` != `cal 10 2005`

You cannot omit the century. `cal 10 05` is October in the year 5 AD.

10

typo . :stuck_out_tongue:

11

Dear friends
in unix one file containing this following data.
test data:
70 noaa-17 hrpt 2005/09/16 259 04:32:00 11:40 4203
42 noaa-17 hrpt 2005/09/16 259 06:12:00 10:50 3905

Now I want to move first line in to another file and simulataniously delete that line in original file.

i think sed command is useful but i dont know the optins how it should give.

please give reply

regards

rajan

12

Your problem is in no way related to the original thread. You should start a new thread.

I doubt you can carry out your problem in one single sed solution. Unless you go with the advanced sed commands.

sed -n -e '1p' test.data > test.1st.line
sed -e '1d' test.data > test.data.tmp
mv test.data.tmp test.data

vino

13

Dear friends

how check in unix weather the file was blank ie (empty) .in shell programming.

because I have a file with two rows , iam reading each row using sed command and copying into another file.simultaniously i am deleting that line in original file.after two lines are written to other file that original file will empty.

I want to write condition in myscript until the original file become blank.

how to write this.

regards
rajan