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How to delete first two lines and last four lines?
I am trying to delete first two lines and last four lines from my text files. How can I do this with Bash? cat input.txt | sed ‘1,2d’ | sed -n -e :a -e ‘1,4! {P;N;D;};N;ba’ You can call the ex editor from the bash command line using the following sample.
How to delete a line from a file, permanently?
Note, if you want to do this in-place, you need to use -i to sed as > will destroy the file before sed can read it. sed has an in-place editing option. It’s more proper to use that in your senario. e.g. For the problem of your case, as the output of “ is not enclosed in double quotes, word splitting is done, by bash. And the newlines are removed.
How to delete a line from a file with SED?
Do this instead: Note, if you want to do this in-place, you need to use -i to sed as > will destroy the file before sed can read it. sed has an in-place editing option. It’s more proper to use that in your senario. e.g. For the problem of your case, as the output of “ is not enclosed in double quotes, word splitting is done, by bash.
When to remove empty lines from a log file?
The below also removes empty lines should they exist at the end of the log file (due to the behaviour of BASH evaluating “$(tail -1000 test.log)”) so does not give a truly 100% accurate truncation in all scenarios, but depending on your situation, may be sufficient.
How to skip the first two lines of a txt file?
I have a powershell script designed to read a txt file on a remote server and import it into SQL. I want to be able to skip the first 2 lines of the txt file.
How to add lines to the end of a 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’ >>file echo ‘second line to add’ >>file echo ‘third line to add’ >>file
How to copy the first few lines of a giant file?
Linux will work with the first one. 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: