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Full Discussion: Removing lines from a file
Top Forums Shell Programming and Scripting Removing lines from a file Post 303013335 by Don Cragun on Monday 19th of February 2018 08:56:12 PM
Old 02-19-2018
What are you trying to match with . in the basic regular expressions you are creating to be used as addresses in sed? What characters does a <period> in a BRE match? Each of the following sed commands will remove every line in the current sample /tmp/wrk file you now have in post #1 in this thread.
Code:
sed -i /.212/d /tmp/wrk
sed -i /.126/d /tmp/wrk
sed -i /.260/d /tmp/wrk
sed -i /.201/d /tmp/wrk
sed -i /.016/d /tmp/wrk

Your last script in post #3, update #3 doesn't currently use .212 or .260; but it does use the other three.

Maybe you'd like to try the following replacement for that script and see if it works any better for you:
Code:
for day in {1..207} {282..356}
do    
  if (( day < 10 )); then
    daytag="00$day" 
  elif (( day < 100 )); then
    daytag="0$day" 
  else
    daytag="$day"
  fi
  rgx="/[.]${daytag}$/d" 
  echo "sed -i \"$rgx\" /tmp/wrk"
  sed -i "$rgx" /tmp/wrk  
done

PS: Note that editing a file a few hundred times with sed is grossly inefficient. You would probably be better off using ed or ex to edit your file once feeding global editing commands to one invocation of that editor and after all of the updates have been completed, add a w command at the end to write all of the updates back to your input file. Running ed once instead of running sed about 290 times will be MUCH faster.
Last edited by Don Cragun; 02-19-2018 at 10:07 PM.. Reason: Add PS.
 

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LEARN ABOUT ULTRIX

calendar

calendar(1)						      General Commands Manual						       calendar(1)

Name
       calendar - calendar reminder service

Syntax
       calendar [-]

Description
       The  command  consults the file `calendar' in the current directory and prints out lines that contain today's or tomorrow's date.  The com-
       mand recognizes most month-day dates, such as Dec. 7, december 7, 12/7, but it does not recognize dates formatted in the following ways:  7
       December  or  7/12.  If you give the month as * with a date, such as, * 1, that day in any month will do.  On weekends, specifying tomorrow
       extends through Monday.

       When an argument is present, the command searches through a user's calendar file in his login directory and sends him any positive  results
       by Normally this is done daily under control of

       The  calendar  file  is	first  run  through  the  C  preprocessor, to include any other calendar files specified with the #include syntax.
       Included calendars are shared by all users, and are maintained and documented by the local administration.

Options
       -    Functions for every user who has a calendar file in his login directory.

Restrictions
       The extended idea of tomorrow does not account for holidays.

Files
       calendar
       /usr/lib/calendar to figure out today's and tomorrow's dates
       /etc/passwd
       /tmp/cal*
       /lib/cpp, egrep, sed, mail as subprocesses

See Also
       at(1), cron(8), mail(1)

																       calendar(1)
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