Cron job throwing error "service: not found [No such file or directory]" but when executed manually in terminal script works fine

service jbossas status -> command will check the jbossas status jbossas(PID) is running (if jbossas is running) jbossas is stopped (if jbossas is stopped) #!/bin/ksh #set -x OUT_LOG="$1" stus=$(service jbossas status) var=$(ps -ef | grep -i '[/]jboss') hname=$(hostname) if [ -z "$var" ]; then echo "service jbossas status" >>$OUT_LOG echo "$stus" >>$OUT_LOG mail -s "Please check for possbile impact $(stus)" aaa@aaa.com /aaa/jboss_status.ksh.error 2>&1 Im receiving the mail with below subject "Please check for possbile impact" NOTE :"jbossas is stopped " is not getting printed at end of the subject In getting below error in the error file created by cron /aaa/jboss_status.ksh: service: not found [No such file or directory] The script is executing fine in cron but the output returned by the command : service jbossas status op: jboss stopped is not getting printed in the subject