create many directories simultaneously

iandroul · 12-10-2007, 01:47 PM

Hi

I want to create 360 empty directories that each one of them has a date of the year\
e.g. 1st directory's title: 010103
2nd directory's title: 010203
etc

How can I do that without doing it one by one?

Thanks

rsashok · 12-10-2007, 02:13 PM

Code:

#!/bin/bash

MAXDIR=360
line=0

while [ "$line" -le $MAXDIR ]
do
mkdir -p 01"$line"03
((line+=1))
done

iandroul · 12-10-2007, 02:41 PM

thanks

how can i add another statement inside :

while [ "$line" -le $MAXDIR ]
do
mkdir -p 01"$line"03
((line+=1))
done

for example:

while [ "$line" -lt 10]

mkdir -p 010"$line"03
((line+=1))
done

#and if "$line" -ge 10 and -le $MAXDIR ]
#
#do
#mkdir -p 01"$line"03
#((line+=1))
#done

"the difference is the 0 before the month character"

pwc101 · 12-10-2007, 02:42 PM

My crude attempt:

Code:

#!/bin/bash

YEAR_START=3
YEAR_END=32

for YR in $(seq $YEAR_START $YEAR_END); do
   if [ $YR -lt 10 ]; then
      for MONTH in $(seq 1 12); do
         if [ $MONTH -lt 10 ]; then
            mkdir 010"$MONTH"0"$YR"
         else
            mkdir 01"$MONTH"0"$YR"
         fi
      done
   else
      for MONTH in $(seq 1 12); do
         if [ $MONTH -lt 10 ]; then
            mkdir 010"$MONTH""$YR"
         else
            mkdir 01"$MONTH""$YR"
         fi
      done
   fi
done

edit: I've done a bit of reading, and you can tweak the for loops so you end up with this instead:

Code:

#!/bin/bash

YEAR_START=3
YEAR_END=32

for YR in $(seq $YEAR_START $YEAR_END); do
   if [ $YR -lt 10 ]; then
      for MONTH in {1..12}; do
         if [ $MONTH -lt 10 ]; then
            mkdir 010"$MONTH"0"$YR"
         else
            mkdir 01"$MONTH"0"$YR"
         fi
      done
   else
      for MONTH in {1..12}; do
         if [ $MONTH -lt 10 ]; then
            mkdir 010"$MONTH""$YR"
         else
            mkdir 01"$MONTH""$YR"
         fi
      done
   fi
done

pixellany · 12-10-2007, 02:44 PM

Obviously, if you are going to increment the date, you will need something more elaborate inside the loop. I'm looking for the commands that would--eg--increment the date by 1 day.

EDIT: I type slowly....

I'm thinking there has to be a way to increment date by days, weeks, or months--I'll post if I find it.

forrestt · 12-10-2007, 03:55 PM

Why 360? Is this supposed to be one directory for each day (there are 366 possible dates)? Should this be MMDDYY or DDMMYY? Do you want to have it follow the months such that months w/ 31 get 013103 (or 310103) and February 022803 (or 280203), etc. or do you simply want 360 directories with 010103 through 046003?

Let us know,

Forrest

pwc101 · 12-10-2007, 04:10 PM

Quote:

Originally Posted by forrestt

Should this be MMDDYY or DDMMYY?

Ah yes, I didn't think of that - I just assumed DDMMYY.

More information needed.

iandroul · 12-10-2007, 04:23 PM

Yes you are right

Eventually I used the below script for each month separately (31 days, 28 days and 30 days) to make the 360 directories for 2003 (e.g. DAYMONTHYEAR)\

Thank you all

#!/bin/bash

MAXDIR=10
line=0

for line in {1..31}; do
if [ "$line" -lt $MAXDIR ]; then
mkdir -p 0"$line"1203
((line+=1))
else
mkdir -p "$line"1203
((line+=1))
fi
done

forrestt · 12-10-2007, 04:31 PM

Do me a favor and run the command "ls *03 |wc -l" in the directory that you made all these directories in and let me know what the output is. I'm still not getting what it is you are trying to do.

Forrest

matthewg42 · 12-10-2007, 05:21 PM

Code:

for ((n=0; n<365; n++)); do 
    mkdir $(date "+%m%d%y" -d "2003-01-01 + $n days")
done

pixellany · 12-10-2007, 08:18 PM

Quote:

Originally Posted by matthewg42

Code:

for ((n=0; n<365; n++)); do 
    mkdir $(date "+%m%d%y" -d "2003-01-01 + $n days")
done

I suspected there was something like this, but I could not find it in the man pages, "info date", ABS, or Google.

In particular, where do you find docs on the ability to do " + $n days"?

matthewg42 · 12-10-2007, 08:26 PM

Quote:

Originally Posted by pixellany

I suspected there was something like this, but I could not find it in the man pages, "info date", ABS, or Google.

In particular, where do you find docs on the ability to do " + $n days"?

It's a good question. I have known this for a while, and I think I must have read it in a manual page at some point. It's something I have noticed - that the manual pages which ship with many distros seem to be somehow not very complete. In the case of Ubuntu, infotex is also absent, so I often see things like "full documentation is found in the info page", and then I can't view it.

matthewg42 · 12-10-2007, 08:33 PM

Aha, a quick google told me that the info pages are installed, but you need to type:

Code:

info coreutils date

...to get to the relevant page. The node you seek can be found using this command (assuming you have the info pages installed:

Code:

info coreutils date "Relative items in date strings"

pixellany · 12-10-2007, 11:20 PM

Quote:

Originally Posted by matthewg42

Aha, a quick google told me that the info pages are installed, but you need to type:

Code:

info coreutils date

...to get to the relevant page. The node you seek can be found using this command (assuming you have the info pages installed:

Code:

info coreutils date "Relative items in date strings"

Thanks!!!--I obviously was not looking carefully. That is a really powerful command...

matthewg42 · 12-11-2007, 06:58 AM

For some reason I have never really liked info pages - I always preferred man pages. Maybe it's that they're all split up into sub-pages I prefer one long document. However, there is a lot of good information in there if you can work out how to navigate through it.

By the way, you can use konqueror as an info browser. Just go type info:/ in the location bar.