How to copy the first few lines of a giant file and add a line of text at the end of it using some Linux commands

Question

How do I copy the first few lines of a giant file and add a line of text at the end of it  using some Linux commands

User · Answer

I am assuming what you are trying to achieve is to insert a line after the first few lines of of a textfile.

head -n10 file.txt >> newfile.txt
echo "your line >> newfile.txt
tail -n +10 file.txt >> newfile.txt

If you don't want to rest of the lines from the file, just skip the tail part.

User · Answer

First few lines  man head   Append lines  use the  gt  gt  operator     in Bash   echo  This goes at the end of the file   gt  gt  file

User · Answer

The head command can get the first n lines  Variations are   head -7 file head -n 7 file head -7l file   which will get the first 7 lines of the file called  file   The command to use depends on your version of head  Linux will work with the first one   To append lines to the end of the same file  use   echo  first line to add   gt  gt file echo  second line to add   gt  gt file echo  third line to add   gt  gt file   or   echo  first line to add second line to add third line to add   gt  gt file   to do it in one hit   So  tying these two ideas together  if you wanted to get the first 10 lines of the input txt file to output txt and append a line with five     characters  you could use something like     head -10 input txt   echo            gt  output txt   In this case  we do both operations in a sub-shell so as to consolidate the output streams into one  which is then used to create or overwrite the output file

[linux] How to copy the first few lines of a giant file, and add a line of text at the end of it using some Linux commands?

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