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How to read log files in linux server

 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 with empty space and only get field 11 than count word based on number of result lines.

Hope you understand my point.

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