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Today, I would like to share with you the relevant knowledge about the method of retrieving exception logs in linux large-scale services. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

Root@ bin # more check_log.sh # check the error log scripts in all specified log files in a directory

#! / usr/bin/env bash # is a declaration of shell

Base= "/ home/project" # defines a variable that specifies the directory where the log is scanned

While [[1]]; definition of infinite loop in do # shell

For name in `ls $base | grep-vE "default" `; # the for loop begins to traverse the files in the directory and filter out the default directory

Do # starts execution

Echo $base/$name # output directory path

If [[- d $base/$name]]; then # determines whether it is a directory or not

Result= `grep-C10 $base/$name/logs/catalina.out | grep-vE "DEBUG | skywalking | 10.8.0.37 grep 8800" | grep-C5-E "Exception | ERROR" `

# get the log of Exception | ERROR reported in the catalina.out file, and filter out the DEBUG | skywalking | 10.8.0.37 ERROR 8800

If [[- z "$result"]]; then # if determines if $result is empty

Continue; # continue

Fi # if Terminator

Echo-e "\ n\ 033 [31mfind Exception in $name\ 033 [0m\ n\ nExcpetion:\ n\ n$result" # A line of colored output indicates which directory has reported an error

Fi # if Terminator

Done # do Terminator

Echo-e "sleep 60 seconds\ n" # output take a minute break

Sleep 60s # wait one minute

Done # do Terminator

Shell is a program written in C language, which is a bridge for users to use Linux. Shell is both a command language and a programming language.

Shell is an application that provides an interface through which users access the services of the operating system kernel.

Shell script (shell script) is a scripting program written for shell.

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