Shell Programming and Scripting

$cat my.log
Jan 07 15:39:03 N/A [error] _M_LocalDirectory     listFiles(): listing files from dir
Jan 07 15:39:03 N/A [error] _w_fm_log:_f_Push()   _w_fm_log_export_ftppush(): Files f
Jan 07 05:58:35 N/A [debug] _w_fm_log_autoexport  1
Jan 08 05:58:35 N/A [debug] _w_fm_log_autoexport  2/var/www/html/sites/default/mods/_
Jan 08 05:58:36 N/A [error] _M_Channel            getIntByNode(): getting _chan from 
Jan 08 05:58:36 N/A [debug] _w_fm_log:_f_Push()   Array
Jan 08 05:58:36 N/A [notice] _w_fm_log:_f_Push()   _w_fm_log_export_active_ftppush__c
Jan 08 05:58:36 N/A [error] _M_LocalDirectory     isDirectory(): directory '/opt/_d_/
Feb 03 14:32:01 N/A [debug] _w_fm_log_mod      Inside _w_fm_log_nodeapi me..
Feb 03 14:32:02 N/A [error] _w_fm_log_mod      Inside _w_fm_log_nodeapi me..
Feb 03 14:32:02 N/A [debug] _w_fm_log_mod      Inside _w_fm_log_nodeapi me..
Feb 05 13:54:32 N/A [debug] _w_fm_log_mod      Inside _w_fm_log_nodeapi me..
Feb 05 13:54:32 N/A [error] _w_fm_log_mod      Inside _w_fm_log_nodeapi me..
Feb 05 13:22:44 N/A [notice] _w_fm_log_mod      Inside _w_fm_log_nodeapi me..
Feb 05 14:22:34 N/A [error] _w_fm_log_mod      Inside _w_fm_log_nodeapi  me..
Feb 07 13:22:44 N/A [debug] _w_fm_log_mod      Inside _w_fm_log_nodeapi me..

$cat my.log |sed -n '/Jan 08/,/Feb 05/p' |sed -n '/error/p' 

Jan 08 05:58:36 N/A [error] _M_Channel            getIntByNode(): getting _chan from
Jan 08 05:58:36 N/A [error] _M_LocalDirectory     isDirectory(): directory '/opt/_d_/
Feb 03 14:32:02 N/A [error] _w_fm_log_mod      Inside _w_fm_log_nodeapi me..

Jan 08 05:58:36 N/A [error] _M_Channel            getIntByNode(): getting _chan from
Jan 08 05:58:36 N/A [error] _M_LocalDirectory     isDirectory(): directory '/opt/_d_/
Feb 03 14:32:02 N/A [error] _w_fm_log_mod      Inside _w_fm_log_nodeapi me..
Feb 05 13:54:32 N/A [error] _w_fm_log_mod      Inside _w_fm_log_nodeapi me..
Feb 05 14:22:34 N/A [error] _w_fm_log_mod      Inside _w_fm_log_nodeapi me..

Result:
Jan 08 : 2 error
Feb 03 : 1 error
Feb 05 : 2 error

sed -n '/Jan 08/,/Feb 06/p'

awk '/Jan 08/ { f=1; }
                /Feb 05/ {c=1; }
                c&&!/Feb 05/ { c=0;f=0; }
                (f||c) && /rror/ { Arr[$1" "$2]++ }
                END { for (i in Arr) print i" "Arr[i]" error"; }' file

$cat test.sh
#!/bin/sh
echo -e " Please provide the log file"
read file

echo -e " Plese give start date\n"
read st_dt

echo -e " Please give End date \n"
read en_dt

awk "/$st_dt/" ' { f=1; }
               "/$en_dt/" {c=1; }
                c&&! "/$en_dt/" { c=0;f=0; }
                (f||c) && /error/ { Arr[$1" "$2]++ }
                END { for (i in Arr) print i" "Arr[i]" error"; }'"$file"

cat my.log |sed  -n '/Jan 08/,/Feb 05/p'| grep 'error' > temp  #getting the content from Jan 08 to Feb 05
cat my.log | sed -n '/Feb 05/,/Feb 05/p' |grep 'error' >> temp #appending the Feb 05 content to the temp file
i=0 #initializing the iterator variable
cat temp #printing the matched content
check=0 #initializing the variable to 0 to check the number of occurrences of errors for particular day
while read line
do
  current=`echo $line | cut -d ' ' -f 1,2` #getting the date alone from the matched lines
  for ((l=0;l<$i;l++))
  do
    if [[ ${k[$l]} == $current ]] #checking whether the content is already available or not to avoid duplicates
    then
      check=1
    fi
  done
  if [[ $check -ne 1 ]]
  then
    k[$i]=$current #adding the value to an array
    let i=i+1;
  fi
  check=0
done <temp 

ind=1
echo -e "\nResult:"
for ((j=0;j<$i;j++)) #printing the final result 
do
  echo "${k[$j]} : `grep -c "${k[$j]}" temp ` error" #grep -c is used to get the count of errors for each day
done

awk '/\[error\]/ {a[$1 FS $2]++} END {for (i in a) print i" : "a[i] " error(s)"}' my.log