awk ‘FNR==NR{a[$1]=$2 FS $3;next} here we handle the 1st input (file2). say, FS is space, we build an array(a) up, index is column1, value is column2 ” ” column3 the FNR==NR and next means, this part of codes work only for file2. you could man gawk check what are NR and FNR { print $0, … Read more
Never use the word “pattern” in this context as it is ambiguous. Always use “string” or “regexp” (or in shell “globbing pattern”), whichever it is you really mean. See How do I find the text that matches a pattern? for more about that. The specific answer you want is: awk ‘f{print;f=0} /regexp/{f=1}’ file or specializing … Read more
Just use var = var1 var2 and it will automatically concatenate the vars var1 and var2: awk ‘{new_var=$1$2; print new_var}’ file You can put an space in between with: awk ‘{new_var=$1″ “$2; print new_var}’ file Which in fact is the same as using FS, because it defaults to the space: awk ‘{new_var=$1 FS $2; print … Read more
To print the second line: awk ‘FNR == 2 {print}’ To print the second field: awk ‘{print $2}’ To print the third field of the fifth line: awk ‘FNR == 5 {print $3}’ Here’s an example with a header line and (redundant) field descriptions: awk ‘BEGIN {print “Name\t\tAge”} FNR == 5 {print “Name: “$3″\tAge: “$2}’ … Read more
You need to set the OFS variable (output field separator) to be a tab: echo “$line” | awk -v var=”$mycol_new” -F’\t’ ‘BEGIN {OFS = FS} {$3 = var; print}’ (make sure you quote the $line variable in the echo statement)
awk ‘$3 ~ /snow/ { print }’ dummy_file
I think -l is too restrictive as it suppresses the output of -n. I would suggest -H (–with-filename): Print the filename for each match. grep -Hn “search” * If that gives too much output, try -o to only print the part that matches. grep -nHo “search” *
How about just sort. sort -t, -nk3 user.csv where -t, – defines your delimiter as ,. -n – gives you numerical sort. Added since you added it in your attempt. If your user field is text only then you dont need it. -k3 – defines the field (key). user is the third field.
In awk, FNR refers to the record number (typically the line number) in the current file, NR refers to the total record number. The operator == is a comparison operator, which returns true when the two surrounding operands are equal. This means that the condition NR==FNR is only true for the first file, as FNR … Read more
You can make use of variable NF which is set to the total number of fields in the input record: awk ‘{print $(NF-1),”\t”,$NF}’ file this assumes that you have at least 2 fields.