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# 1  
Old 09-10-2013
If condition help required
I have a if condition it checks its pid exist it means it is running, otherwise not running.

I am checking with ps

Code:
x=`ps -fu myuserid|grep java| |grep -v grep | awk '{print $2}'`

if [$x -eq 0 ]

then ............

Above code is giving integer error, because currently process of java is not running so its value is zero, so how i can i do that to check process exist then tell us process exist, otherwise tell us process not exist.
# 2  
Old 09-10-2013
If should have space between brackets...
can reduce one grep
and avoid use of back tick's

try

Code:
x=$(ps -fu myuserid| grep -v grep | awk '/java/{print $2}')

if [ $x -eq 0 ]

This User Gave Thanks to pamu For This Post:
learnbash
# 3  
Old 09-10-2013
Code:
x=$(ps -fu myuserid | grep [j]ava | awk '{print $2}')
if [ ! -z $x ]
then
  echo process is running
else
  echo process not running
fi

This User Gave Thanks to krishmaths For This Post:
learnbash
# 4  
Old 09-10-2013
Code:
if [ $(ps -fu myuserid | grep -c [j]ava) -gt 0 ]
then    echo 'process is running'
else    echo 'process not running'
fi

These 2 Users Gave Thanks to Don Cragun For This Post:
learnbash RavinderSingh13
# 5  
Old 09-10-2013
Or:
Code:
ps -fu myuserid | grep [j]ava > /dev/null &&
  echo 'process is running' ||
    echo 'process not running'

Code:
if ps -fu myuserid | grep [j]ava > /dev/null; then
  echo 'process is running' 
else  
  echo 'process not running'
fi

If the grep implementation supports -q you can get rid of the > /dev/null part.
If pgrep is available (Linux/Solaris) you could substitute the above ps .. | grep .. pipeline with: pgrep -u myuserid -f [j]ava
This User Gave Thanks to radoulov For This Post:
learnbash
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