How to display the current month using cal

hello111 · 10-11-2014, 08:11 PM

Hello, I got stuck in a question "Display the current month using 'cal', translating to uppercase using 'tr'.". Please help me

unSpawn · 10-11-2014, 08:18 PM

See the "description line in 'man cal' and search 'man tr' for "upper"?

jdkaye · 10-12-2014, 05:53 AM

This sounds like homework. Please show the commands you tried and what error messages (if any) you received. Also "translating to uppercase" is not at all clear. Translating what? The name of the month? The abbreviated days of the week? What?

And in the future please use a more descriptive thread title than "Please help me". Something like "Displaying calendar using the cal command" would give a better idea of what your problem is.
jdk

hello111 · 10-12-2014, 11:53 PM

Thanks you guys. It's my homework, yes. My command was like : cal | tr 'a-z' 'A-Z', it didn't work and the hint is: use | command.

pan64 · 10-13-2014, 12:34 AM

| is already in use (as I see), there should be something else too... Probably see the man page of cal, and try to find out how to display exactly what you need.

nisagnel · 10-13-2014, 02:22 AM

Hello hello111,

If you want to display only current month you can go for date command like below.
date +%B | tr 'a-z' 'A-Z'

If you want the whole month calender with upper case month,then ur command "cal | tr 'a-z' 'A-Z'" works fine.

hello111 · 10-13-2014, 10:04 AM

Here is the question and the hint. Thanks you guys for helping me.

hello111 · 10-13-2014, 10:09 AM

Tks nisagnel, I try your comment but it didn't work

yancek · 10-13-2014, 12:11 PM

Quote:

cal | tr 'a-z' 'A-Z', it didn't work

Don't know why that didn't work, it worked for me. Not sure really what you are expecting.

hello111 · 10-13-2014, 03:46 PM

Quote:

Originally Posted by yancek

Don't know why that didn't work, it worked for me. Not sure really what you are expecting.

I don't know to

but it didn't work

jkirchner · 10-13-2014, 03:58 PM

What do you think it is supposed to do? All the days of the week are capitalized as is the name of the month. That is what that line does.

The code produces (note the month and the days of the week are capitalized):
This is what I entered:

Code:

cal | tr 'a-z' 'A-Z'

Code:

    OCTOBER 2014      
SU MO TU WE TH FR SA  
          1  2  3  4  
 5  6  7  8  9 10 11  
12 13 14 15 16 17 18  
19 20 21 22 23 24 25  
26 27 28 29 30 31

regular cal does:

Code:

    October 2014      
Su Mo Tu We Th Fr Sa  
          1  2  3  4  
 5  6  7  8  9 10 11  
12 13 14 15 16 17 18  
19 20 21 22 23 24 25  
26 27 28 29 30 31

What do you think it should do? When you type the code I did what is the output?

hello111 · 10-14-2014, 06:24 PM

Here is my work, I did try use a command cal | tr 'a-z' 'A-Z' but it seem didn't work

AnanthaP · 10-14-2014, 06:57 PM

The response from the system "You entered ..." shows that you are within your structured question bank environment and not the shell. Two things to do:
1) Try cal 10 2014 | tr ... within your environment and
2) Go to a regular shell prompt and enter cal | tr ... and so on.

Option 2) should work. If option 1) works with year and month as arguments, go tell your examiner to improve the test bank.

OK

nisagnel · 10-15-2014, 12:37 AM

Hi hello111,

What AnanthaP suggests, is right.

Also if you want only upper case month from cal command,type the following command in your shell(if you type in somewhere,definetely it won't work).

[root@localhost]# cal | head -n1 | awk '{print $1}' | tr 'a-z' 'A-Z'
OCTOBER

is that you want?

evo2 · 10-15-2014, 01:06 AM

Hi,

why do you think 'a-z' and 'A-Z' are valid? As already pointed out, check the man page of tr.

Evo2.