Let say you want to read file with specific string than write command Go to /var/log and log directory let say jasmin where we are going to read message.log file Commad: -cat message.log | grep status:CommandStatus.ESME_ROK //hit enter it will show results with status:CommandStatus.ESME_ROK string. And if you want to calculate number of lines, word, characters -cat message.log | grep status:CommandStatus.ESME_ROK | wc -cat message.log | grep status:CommandStatus.ESME_ROK | wc -l // l for lines -cat message.log | grep status:CommandStatus.ESME_ROK | wc -w / wo for words -cat message.log | grep status:CommandStatus.ESME_ROK | wc -c // c for charac Filter the line and only specified content than add extra command to your command line -cat message.log | grep status:CommandStatus.ESME_ROK | cut -d " " -f 11 | wc -l Now what does it mean get me the content of message.log file where this "status:CommandStatus.ESME_ROK" string abd cut the line replace wi...