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How to delete a column with GNU AWK?
With GNU awk for inplace editing, \\s/\\S, and gensub () to delete Without GNU awk you need a match () + substr () combo or multiple sub () s + vars to remove a middle field. See also Print all but the first three columns.
How to remove a specific character using awk or SED?
I’d like to know how to remove unwanted characters with awk or sed. s/X/Y/ replaces X with Y. g means all occurrences should be replaced, not just the first one. I can’t verify it for you because I don’t know your exact input, but the following works: See also this question on removing single quotes.
How to remove two columns from input file?
I want to delete the two columns INFO_NAM and PROCID from my input file. etc.. I believe awk is the best for that. It is possible to use cut as well.
Which is the best way to delete a column?
The best way to delete columns is with cut: cut –complement -d’ ‘ -f6,8 file
How to remove a string from a field in AWK?
FS is space, ” “, by default – which also has the special effect of ignoring leading and trailing spaces. Also, instead of using print $1, , or the printf variant one could set OFS to tab. Output Field Separator ( OFS) as tab, and alternative FS inside awk.
Can you use AWK as a field separator?
I want to do it with awk if possible. But in your simple case grep approach would be even simpler: If the input only contains the timestamps, then it’s easy to set the dash as the field separator and only print the first field:
When to use a gawk extension to AWK?
Gawk manual – it usually is noted when things are a gawk extension to awk. The field separator of the split function is a regular expression, so you can split on = OR ;. If you know that $9 begins with “ID=”, then If “ID=” is not necessarily at the beginning of the field, then there’s a little more work to do: