Both files has lines of string and numeric data minimum of 2000 lines.
How to add non duplicate data from file2.txt to file1.txt.
Basically file2 has the new data lines but we also want to ensure we are not adding duplicate lines to file1.txt.
File1.txt > this is the main data file
File2.txt > this file has the new data we want to add to file1
thanks,
Sort the two files together with the -u option to remove duplicates.
sort -u File1.txt File2.txt > NewFile.txt && mv NewFile.txt File1.txt
Another option if the file is sorted, just to have some choice (and I like comm :) )
comm --check-order --output-delimiter='' -13 File1.txt File2.txt >> File1.txt
use awk:
awk '!a[$0]++' File1.txt File2.txt
You can use grep, like this:
# grep those lines from file2 which are not in file1
grep -vFf file1 file2 > new_file2
# append the results to file1
cat new_file2 >> file1
Related
I'm trying to combine multiple files to 1 file using cat command.
However I wish to add a separation line like "----" in between the file contents.
Is there a way we can achieve this with cat or any other tool?
cat file1 file2 file3 file4 > newfile
you can use the following command for combining multiple files with --- delimiter.
awk 'FNR==1 && NR!=1 {print "---"}{print}' file1 file2 > newfile
command is copied from this post of Unix stack excahnge
https://unix.stackexchange.com/questions/163782/combine-two-text-files-with-adding-some-separator-between
I want to copy lines 10 to 15 of a file into another file in Unix.
I am having files file1.txt and file2.txt.
I want to copy lines 10 to 15 from file1.txt to file2.txt.
Open a terminal with a shell then
sed -n '10,15p' file1.txt > file2.txt
Simple & easy.
If you want to append to the end instead of wiping file2.txt, use >> for redirection.
sed -n '10,15p' file1.txt >> file2.txt
^^
AWK is also a powerful command line text manipulator:
awk 'NR>=10 && NR<=15' file1.txt > file2.txt
In complement to the previous answer, you can use one of the following 3 solutions.
sed
Print only the lines in the range and redirect it to the output file
sed -n '10,15p' file1.txt > file2.txt
head/tail combination
Use head and tail to cut the file and to get only the range you need before redirecting the output to a file
head -n 15 file1.txt | tail -n 6 > file2.txt
awk
Print only the lines in the range and redirect it to the output file
awk 'NR>=10 && NR<=15' file1.txt > file2.txt
I have two files
File1.txt:
docker/registry:2.4.2
docker/rethinkdb:latest
docker/swarm:1.0.0
File2.txt:
docker/registry:2.4.1
docker/rethinkdb:1.0.0
docker/swarm:1.0.0
The output should be:
docker/registry:2.4.2
docker/rethinkdb:latest
In other words, every line in File1 that doesn't exist in File2 should be part of the output.
I have tried doing the following but it is not working.
diff File1.txt File2.txt
You could just use grep for it:
$ grep -v -f file2.txt file1.txt
docker/registry:2.4.2
docker/rethinkdb:latest
If there are lots of rows in the files I'd probably use #user000001 solution.
With awk you can do:
awk 'NR==FNR{a[$0];next}!($0 in a)' file2 file1
With comm:
comm -23 <(sort File1.txt) <(sort File2.txt)
I want to compare two files and redirect the difference between the two files to third one.
file1:
/opt/a/a.sql
/opt/b/b.sql
/opt/c/c.sql
In case any file has # before /opt/c/c.sql, it should skip #
file2:
/opt/c/c.sql
/opt/a/a.sql
I want to get the difference between the two files. In this case, /opt/b/b.sql should be stored in a different file. Can anyone help me to achieve the above scenarios?
file1
$ cat file1 #both file1 and file2 may contain spaces which are ignored
/opt/a/a.sql
/opt/b/b.sql
/opt/c/c.sql
/opt/h/m.sql
file2
$ cat file2
/opt/c/c.sql
/opt/a/a.sql
Do
awk 'NR==FNR{line[$1];next}
{if(!($1 in line)){if($0!=""){print}}}
' file2 file1 > file3
file3
$ cat file3
/opt/b/b.sql
/opt/h/m.sql
Notes:
The order of files passed to awk is important here, pass the file to check - file2 here - first followed by the master file -file1.
Check awk documentation to understand what is done here.
You can use some tools like cat, sed, sort and uniq.
The main observation is this: if the line is in both files then it is not unique in cat file1 file2.
Furthermore in cat file1 file2| sort, all doubles are in sequence. Using uniq -u we get unique lines and have this pipe:
cat file1 file2 | sort | uniq -u
Using sed to remove leading whitespace, empty and comment lines, we get this final pipe:
cat file1 file2 | sed -r 's/^[ \t]+//; /^#/ d; /^$/ d;' | sort | uniq -u > file3
as you can read in the title Im dealing with two files. Her is the example how the look like.
file1:
Name (additional info separated by a tab from the name)
Peter Schwarzer<tab>Best friend of mine
file2:
Name (followed by a float separated by a tab from the name)
Peter Schwarzer<tab>1456
So what i want to do is use file1 one as an index for searching file2. If the Names match it should be written in file3 which should contain the Name followed by the float from file2 followed by the additional info from file1.
So file3 should look like:
Peter Schwarzer<tab>1456<tab>Best friend of mine
(everything separated by tab)
I tried grep -f to read a pattern from a file and without the additional information it works. So is there any way to get the desired result with grep or is AWK the answer?
Thanks in advance,
Julian
give this line a try, I didn't test, but should go:
awk -F'\t' -v OFS="\t" 'NR==FNR{n[$1]=$2;next}$1 in n{print $0,n[$1]}' file1 file2 > file3
Try this awk one liner!
awk -v FS="\t" -v OFS="\t" 'FNR==NR{ A[$1]=$2; next}$1 in A{print $0,A[$1];}' file1.txt file2.txt > file3.txt
To me this looks like a job for join:
join -t '\t' file1 file2
This assumes file1 and file2 are sorted. If not, sort them first:
sort -o file1 file1
sort -o file2 file2
join -t '\t' file1 file2
If you can't modify file1 and file2 (if you need to leave them in their original, unsorted state), use a temporary file:
tmpfile=/tmp/tf$$
sort file1 > $tmpfile
sort file2 | join -t '\t' $tmpfile -
If join says "illegal tab character specification" you'll have to use join -t ' ' where you type an actual tab between the single quotes (and depending on your shell, you may have to use control-V before that tab).