wrong returne value

richardmaxxx · 12-11-2013, 06:37 AM

Hi All
when i am using this command in the localhost

[CODE]

Code:

Server_Name:apache:/opt/apache $ ps -ef | grep -i http | grep -i xxxx
root     	       30383     1  0 10:49 ?        	 00:00:00 /opt/apache/xxxx/bin/httpd -f /opt/apache/xxxx/conf/httpd.conf 
User_name   30384 30383  0 10:49 ?        00:00:00 /opt/apache/xxxx/bin/httpd -f /opt/apache/xxxx/conf/httpd.conf 
User_name   30385 30383  0 10:49 ?        00:00:32 /opt/apache/xxxx/bin/httpd -f /opt/apache/xxxx/conf/httpd.conf 
User_name   30386 30383  0 10:49 ?        00:00:33 /opt/apache/xxxx/bin/httpd -f /opt/apache/xxxx/conf/httpd.conf 

Server_Name:apache:/opt/apache $ ps -ef | grep -i http | grep -i xxxx | awk '{print $10}' | grep -v grep | uniq
/opt/apache/xxxx/conf/httpd.conf

when i use the ssh command to run the same command in another server

Code:

Server_Name:apache:/opt/apache $ ssh -q Server_Name " ps -ef | grep -i http | grep -i xxxx | awk '{print $10}' | grep -v grep | uniq "
0

why the difference happen in the result of this 2 command on localhost and using ssh to run the same command on remote server

pan64 · 12-11-2013, 06:52 AM

probably ps returns something else, you need to check the output.
You can simplify it by:
ps -ef | awk '/[/]xxxx.*http/{print $10}' | uniq
also uniq can be eliminated (if you wish)
You can also modify your ssh to execute only ps on the remote side:
ssh -q Server_Name "ps -ef" | awk command...