grep Command for a specific string excluding subset string

grep -rnw “superlists.settings” -e “DJANGO_SETTINGS”

Explanation of flags:

 -r, --recursive
              Read all files under each directory, recursively, following
              symbolic links only if they are on the command line.  Note
              that if no file operand is given, grep searches the working
              directory.

-r, --recursive

Read all files under each directory, recursively, following

symbolic links only if they are on the command line. Note

that if no file operand is given, grep searches the working

directory.

  -n, --line-number
              Prefix each line of output with the 1-based line number within
              its input file.

-n, --line-number

Prefix each line of output with the 1-based line number within

its input file.

 -w, --word-regexp
              Select only those lines containing matches that form whole
              words.  The test is that the matching substring must either be
              at the beginning of the line, or preceded by a non-word
              constituent character.  Similarly, it must be either at the
              end of the line or followed by a non-word constituent
              character.  Word-constituent characters are letters, digits,
              and the underscore.  This option has no effect if <b>-x </b>is also
              specified.

-w, --word-regexp

Select only those lines containing matches that form whole

words. The test is that the matching substring must either be

at the beginning of the line, or preceded by a non-word

constituent character. Similarly, it must be either at the

end of the line or followed by a non-word constituent

character. Word-constituent characters are letters, digits,

and the underscore. This option has no effect if -x is also

specified.

Matching Control
       -e PATTERNS, --regexp=PATTERNS 
              Use <i>PATTERNS</i> as the patterns. If this option is used multiple times 
              or is combined with the <b>-f </b>(<b>--file</b>) option, search for all patterns given. 
              This option can be used to protect a pattern beginning with “-”.

Matching Control

-e PATTERNS, --regexp=PATTERNS

Use PATTERNS as the patterns. If this option is used multiple times

or is combined with the -f (--file) option, search for all patterns given.

This option can be used to protect a pattern beginning with “-”.

grep Command for a specific string excluding subset string

Category: Computer Programming Notes

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log files for postgreSQL, Nginx, Django and gunicorn

November 4, 2018November 4, 2018 Written by Albert

postgreSQL :

/var/log/postgresql/postgresql-10-main.log

1	/var/log/postgresql/postgresql-10-main.log

Nginx:

var/log/nginx/access.log

1	var/log/nginx/access.log

Django: Add this first to settings.py

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'filters': {
        'require_debug_false': {
            '()': 'django.utils.log.RequireDebugFalse'
        }
    },
    'handlers': {
        'applogfile': {
          'level':'DEBUG',
          'class':'logging.handlers.RotatingFileHandler',
          'filename': '/var/log/django.log',
          'maxBytes': 1024*1024*15, # 15MB
          'backupCount': 10,
        }
    },
    'loggers': {
        'django.request': {
            'handlers': ['applogfile'],
            'level': 'ERROR',
            'propagate': True,
        },
    }
}

LOGGING = {

'version': 1,

'disable_existing_loggers': False,

'filters': {

'require_debug_false': {

'()': 'django.utils.log.RequireDebugFalse'

}

'handlers': {

'applogfile': {

'level':'DEBUG',

'class':'logging.handlers.RotatingFileHandler',

'filename': '/var/log/django.log',

'maxBytes': 1024*1024*15, # 15MB

'backupCount': 10,

}

'loggers': {

'django.request': {

'handlers': ['applogfile'],

'level': 'ERROR',

'propagate': True,

}

then check here:

'/var/log/django.log

1	'/var/log/django.log

Gunicorn:

/var/log/gunicorn_access.log

1	/var/log/gunicorn_access.log

Use the command cat or tail to see the output.

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