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There's problem with shell script...Help me~

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Operating Systems AIX There's problem with shell script...Help me~
# 1  
Old 04-09-2010
Question There's problem with shell script...Help me~
Hello, guys...

I'm new to IBM AIX server admin. Actuall, I administrate Oracle 10g on it.

*SYSTEM INFO
- IBM AIX 6 Powerpc
- Oracle 10g R2 (10.2.0.4.0 - 64bit)

I wrote a script like bellow...

Code:
DATE='date'
cp /oracle/product/10g/network/log/listener_temp.log /oracle/product/10g/network/log/listener_temp_$DATE

cat /dev/null > /oracle/product/10g/network/log/listener_temp.log

# compress -vf /oracle/product/10g/network/log/listener_temp_$DATE

I declare a variable DATE at first line and result was below...

Code:
-rw-r-----    1 oracle   dba               0 Apr 09 14:26 listener_temp.log
-rw-r-----    1 root     system            0 Apr 09 14:26 listener_temp_date

I expected "listener_temp_20100408" like this.
However, result was like below "listener_temp_date"

what's problem?
Last edited by zxmaus; 04-09-2010 at 06:19 AM.. Reason: added code tags
# 2  
Old 04-09-2010
Quote:
Originally Posted by daniel han
Hello, guys...

I'm new to IBM AIX server admin. Actuall, I administrate Oracle 10g on it.

*SYSTEM INFO
- IBM AIX 6 Powerpc
- Oracle 10g R2 (10.2.0.4.0 - 64bit)

I wrote a script like bellow...

DATE='date'
cp /oracle/product/10g/network/log/listener_temp.log /oracle/product/10g/network/log/listener_temp_$DATE

cat /dev/null > /oracle/product/10g/network/log/listener_temp.log

# compress -vf /oracle/product/10g/network/log/listener_temp_$DATE


I declare a variable DATE at first line and result was below...

-rw-r----- 1 oracle dba 0 Apr 09 14:26 listener_temp.log
-rw-r----- 1 root system 0 Apr 09 14:26 listener_temp_date

I expected "listener_temp_20100408" like this.
However, result was like below "listener_temp_date"

what's problem?
Change the variable diclaration in code
DATE='date' # not corect
use
DATE=`date`
# 3  
Old 04-09-2010
hi, amitranjansahu.

It's done. ` and ' is totally looks same. Thank you so much~
# 4  
Old 04-09-2010
Do not use the backticks ("`"), as they are there only for backward compatibility and should not be used if more modern means are available. Use "$(command)" instead of "`command`":

Code:
date="$(date +'%Y%m%d')"

I hope this helps.

bakunin
# 5  
Old 04-12-2010
Thanks a lot bakunin
Smilie
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