Remove Characters From the Start of a Large File
This page answers questions like these:
- How to remove characters from the start of a text file?
- How to remove characters from the start of a large file?
- How to remove characters from the start of a huge file?
- How to remove characters from the start of a massive file?
- How to remove characters from the start of a enormous file?
Related Links:
Remove Characters From the End of a Binary File
Remove Characters From the End of a Large File
Remove Characters From the Start of a Binary File
Count Occurrences of a Hexadecimal Sequence in a File
Count Occurrences of a String in a File
Find Positions of a Hexadecimal Sequence in a File
Join Lines of Text File Together
Output Lines of a File in Reverse Order
Output the Lines Between Two Matching Lines
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Remove Characters From the Start of a Large File:
dd if=FILE1 of=FILE2 bs=1 count=FILESIZE2 skip=BYTES
- Read through FILE1, skipping the first BYTES bytes, then copying FILESIZE2 bytes from file FILE1 to new file FILE2.
- Pros: Works for both text and binary files. With a carefully chosen value of FILESIZE2, can be used to simultaneously remove characters from both the start and end of a file!
- Cons: Very slow.
If the numbers FILESIZE2 and BYTES have a common factor, putting that factor into the bs parameter and dividing the FILESIZE2 and BYTES parameters by the common factor may alleviate this problem.
Remove the First Few Characters From the First Line of a Large Text File:
sed -i '1s/^.\{3\}//' FILE
- Remove the first 3 characters from the first line of text file FILE.
- Pros: Can do regular expression matching and substitution.
- Cons: Doesn’t work for binary files.
- Caveats: This example doesn’t work if the first line of the file has less than 3 characters.
Related Links:
Remove Characters From the End of a Binary File
Remove Characters From the End of a Large File
Remove Characters From the Start of a Binary File
Count Occurrences of a Hexadecimal Sequence in a File
Count Occurrences of a String in a File
Find Positions of a Hexadecimal Sequence in a File
Join Lines of Text File Together
Output Lines of a File in Reverse Order
Output the Lines Between Two Matching Lines
Sed Cannot Rename Temporary File Permission Denied
Home > Linux / Unix > Remove Characters From the Start of a Large File
Tags: remove characters from start, remove characters from beginning, text file, large file, huge file, massive file, enormous file, long file, linux, unix, solaris, bsd, aix
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