Add prefix to each lines of file from other file
I have two files named file1.txt and file2.txt, I'm trying to add the prefix to file2.txt from file1.txt in a manner so I can pipe the results to the next utility I'm using.
cat file1.txt
aa
bb
cc
cat file2.txt
site.com
site2.com
site3.com
Expected result will look like:
aa.site.com
aa.site2.com
aa.site3.com
bb.site.com
bb.site2.com
bb.site3.com
cc.site.com
cc.site2.com
cc.site3.com
linux command-line sed
asked Jan 12 at 10:00
SamSam
1
add a comment |
I have two files named file1.txt and file2.txt, I'm trying to add the prefix to file2.txt from file1.txt in a manner so I can pipe the results to the next utility I'm using.
cat file1.txt
aa
bb
cc
cat file2.txt
site.com
site2.com
site3.com
Expected result will look like:
aa.site.com
aa.site2.com
aa.site3.com
bb.site.com
bb.site2.com
bb.site3.com
cc.site.com
cc.site2.com
cc.site3.com
linux command-line sed
asked Jan 12 at 10:00
SamSam
1
Please take a look at: What should I do when someone answers my question?
– Cyrus
Jan 13 at 12:42
add a comment |
I have two files named file1.txt and file2.txt, I'm trying to add the prefix to file2.txt from file1.txt in a manner so I can pipe the results to the next utility I'm using.
cat file1.txt
aa
bb
cc
cat file2.txt
site.com
site2.com
site3.com
Expected result will look like:
aa.site.com
aa.site2.com
aa.site3.com
bb.site.com
bb.site2.com
bb.site3.com
cc.site.com
cc.site2.com
cc.site3.com
linux command-line sed
asked Jan 12 at 10:00
SamSam
1
I have two files named file1.txt and file2.txt, I'm trying to add the prefix to file2.txt from file1.txt in a manner so I can pipe the results to the next utility I'm using.
cat file1.txt
aa
bb
cc
cat file2.txt
site.com
site2.com
site3.com
Expected result will look like:
aa.site.com
aa.site2.com
aa.site3.com
bb.site.com
bb.site2.com
bb.site3.com
cc.site.com
cc.site2.com
cc.site3.com
linux command-line sed
linux command-line sed
asked Jan 12 at 10:00
SamSam
1
asked Jan 12 at 10:00
SamSam
1
asked Jan 12 at 10:00
SamSam
1
asked Jan 12 at 10:00
SamSam
1
asked Jan 12 at 10:00
SamSam
1
1
Please take a look at: What should I do when someone answers my question?
– Cyrus
Jan 13 at 12:42
add a comment |
Please take a look at: What should I do when someone answers my question?
– Cyrus
Jan 13 at 12:42
Please take a look at: What should I do when someone answers my question?
– Cyrus
Jan 13 at 12:42
Please take a look at: What should I do when someone answers my question?
– Cyrus
Jan 13 at 12:42
add a comment |
2 Answers
2
active
oldest
votes
With bash:
while IFS= read -r line1; do while IFS= read -r line2; do echo "$line1.$line2"; done <file2.txt; done <file1.txt
or
join -j 64 <(sort file1.txt) <(sort file2.txt) -o 1.1,2.1 | sed 's/ /./'
Output:
aa.site.com
aa.site2.com
aa.site3.com
bb.site.com
bb.site2.com
bb.site3.com
cc.site.com
cc.site2.com
cc.site3.com
answered Jan 12 at 11:08
CyrusCyrus
3,79611024
Thank you for your answer @Cyrus, it works as expected.
– Sam
Jan 13 at 12:09
add a comment |
The easy part is that you can use paste to merge the lines of your files. Its -d option lets you choose a delimiter (here, a .).
The hard part here is the Cartesian product. Borrowing from this answer on SO, we can come up with a command like this:
paste -d '.'
<(sed -n "$(yes 'p;' | head -n $(wc -l <file2.txt) )" file1.txt)
<(cat $(yes 'file2.txt' | head -n $(wc -l <file1.txt)))
Where we:
- Combine
yesandheadto make asedscript that will print each line offile1.txta number of times equal to the number of lines infile2.txt; - Combine
yesandheadto makecatprintfile2.txta number of times equal to the number of lines infile1.txt; - Use
pasteto merge each pair of lines printed by the two process substitutions (<(...)), separated by a..
Of course you can pipe the result into other commands.
Also, note that you can always pipe the output of commands, even if they are in a loop, as in this other answer you have. E.g. try
while ... do ... done <file | cat -
For convenience, you can define a function and make it available to your environment (e.g. defining it in your .bashrc if you use bash).
An example, here using loops to minimize the need for external tools:
function cart_prod () {
while IFS= read -r line1; do
while IFS= read -r line2; do
printf '%s.%sn' "$line1" "$line2"
done <"$2"
done <"$1"
}
Sample usage:
$ cart_prod file1.txt file2.txt | sort -r
cc.site.com
cc.site3.com
cc.site2.com
bb.site.com
bb.site3.com
bb.site2.com
aa.site.com
aa.site3.com
aa.site2.com
answered Jan 12 at 11:08
fra-sanfra-san
22614
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
With bash:
while IFS= read -r line1; do while IFS= read -r line2; do echo "$line1.$line2"; done <file2.txt; done <file1.txt
or
join -j 64 <(sort file1.txt) <(sort file2.txt) -o 1.1,2.1 | sed 's/ /./'
Output:
aa.site.com
aa.site2.com
aa.site3.com
bb.site.com
bb.site2.com
bb.site3.com
cc.site.com
cc.site2.com
cc.site3.com
answered Jan 12 at 11:08
CyrusCyrus
3,79611024
Thank you for your answer @Cyrus, it works as expected.
– Sam
Jan 13 at 12:09
add a comment |
With bash:
while IFS= read -r line1; do while IFS= read -r line2; do echo "$line1.$line2"; done <file2.txt; done <file1.txt
or
join -j 64 <(sort file1.txt) <(sort file2.txt) -o 1.1,2.1 | sed 's/ /./'
Output:
aa.site.com
aa.site2.com
aa.site3.com
bb.site.com
bb.site2.com
bb.site3.com
cc.site.com
cc.site2.com
cc.site3.com
answered Jan 12 at 11:08
CyrusCyrus
3,79611024
Thank you for your answer @Cyrus, it works as expected.
– Sam
Jan 13 at 12:09
add a comment |
With bash:
while IFS= read -r line1; do while IFS= read -r line2; do echo "$line1.$line2"; done <file2.txt; done <file1.txt
or
join -j 64 <(sort file1.txt) <(sort file2.txt) -o 1.1,2.1 | sed 's/ /./'
Output:
aa.site.com
aa.site2.com
aa.site3.com
bb.site.com
bb.site2.com
bb.site3.com
cc.site.com
cc.site2.com
cc.site3.com
answered Jan 12 at 11:08
CyrusCyrus
3,79611024
With bash:
while IFS= read -r line1; do while IFS= read -r line2; do echo "$line1.$line2"; done <file2.txt; done <file1.txt
or
join -j 64 <(sort file1.txt) <(sort file2.txt) -o 1.1,2.1 | sed 's/ /./'
Output:
aa.site.com
aa.site2.com
aa.site3.com
bb.site.com
bb.site2.com
bb.site3.com
cc.site.com
cc.site2.com
cc.site3.com
answered Jan 12 at 11:08
CyrusCyrus
3,79611024
edited Jan 12 at 11:13
answered Jan 12 at 11:08
CyrusCyrus
3,79611024
answered Jan 12 at 11:08
CyrusCyrus
3,79611024
answered Jan 12 at 11:08
CyrusCyrus
3,79611024
3,79611024
Thank you for your answer @Cyrus, it works as expected.
– Sam
Jan 13 at 12:09
add a comment |
Thank you for your answer @Cyrus, it works as expected.
– Sam
Jan 13 at 12:09
Thank you for your answer @Cyrus, it works as expected.
– Sam
Jan 13 at 12:09
Thank you for your answer @Cyrus, it works as expected.
– Sam
Jan 13 at 12:09
add a comment |
The easy part is that you can use paste to merge the lines of your files. Its -d option lets you choose a delimiter (here, a .).
The hard part here is the Cartesian product. Borrowing from this answer on SO, we can come up with a command like this:
paste -d '.'
<(sed -n "$(yes 'p;' | head -n $(wc -l <file2.txt) )" file1.txt)
<(cat $(yes 'file2.txt' | head -n $(wc -l <file1.txt)))
Where we:
- Combine
yesandheadto make asedscript that will print each line offile1.txta number of times equal to the number of lines infile2.txt; - Combine
yesandheadto makecatprintfile2.txta number of times equal to the number of lines infile1.txt; - Use
pasteto merge each pair of lines printed by the two process substitutions (<(...)), separated by a..
Of course you can pipe the result into other commands.
Also, note that you can always pipe the output of commands, even if they are in a loop, as in this other answer you have. E.g. try
while ... do ... done <file | cat -
For convenience, you can define a function and make it available to your environment (e.g. defining it in your .bashrc if you use bash).
An example, here using loops to minimize the need for external tools:
function cart_prod () {
while IFS= read -r line1; do
while IFS= read -r line2; do
printf '%s.%sn' "$line1" "$line2"
done <"$2"
done <"$1"
}
Sample usage:
$ cart_prod file1.txt file2.txt | sort -r
cc.site.com
cc.site3.com
cc.site2.com
bb.site.com
bb.site3.com
bb.site2.com
aa.site.com
aa.site3.com
aa.site2.com
answered Jan 12 at 11:08
fra-sanfra-san
22614
add a comment |
The easy part is that you can use paste to merge the lines of your files. Its -d option lets you choose a delimiter (here, a .).
The hard part here is the Cartesian product. Borrowing from this answer on SO, we can come up with a command like this:
paste -d '.'
<(sed -n "$(yes 'p;' | head -n $(wc -l <file2.txt) )" file1.txt)
<(cat $(yes 'file2.txt' | head -n $(wc -l <file1.txt)))
Where we:
- Combine
yesandheadto make asedscript that will print each line offile1.txta number of times equal to the number of lines infile2.txt; - Combine
yesandheadto makecatprintfile2.txta number of times equal to the number of lines infile1.txt; - Use
pasteto merge each pair of lines printed by the two process substitutions (<(...)), separated by a..
Of course you can pipe the result into other commands.
Also, note that you can always pipe the output of commands, even if they are in a loop, as in this other answer you have. E.g. try
while ... do ... done <file | cat -
For convenience, you can define a function and make it available to your environment (e.g. defining it in your .bashrc if you use bash).
An example, here using loops to minimize the need for external tools:
function cart_prod () {
while IFS= read -r line1; do
while IFS= read -r line2; do
printf '%s.%sn' "$line1" "$line2"
done <"$2"
done <"$1"
}
Sample usage:
$ cart_prod file1.txt file2.txt | sort -r
cc.site.com
cc.site3.com
cc.site2.com
bb.site.com
bb.site3.com
bb.site2.com
aa.site.com
aa.site3.com
aa.site2.com
answered Jan 12 at 11:08
fra-sanfra-san
22614
add a comment |
The easy part is that you can use paste to merge the lines of your files. Its -d option lets you choose a delimiter (here, a .).
The hard part here is the Cartesian product. Borrowing from this answer on SO, we can come up with a command like this:
paste -d '.'
<(sed -n "$(yes 'p;' | head -n $(wc -l <file2.txt) )" file1.txt)
<(cat $(yes 'file2.txt' | head -n $(wc -l <file1.txt)))
Where we:
- Combine
yesandheadto make asedscript that will print each line offile1.txta number of times equal to the number of lines infile2.txt; - Combine
yesandheadto makecatprintfile2.txta number of times equal to the number of lines infile1.txt; - Use
pasteto merge each pair of lines printed by the two process substitutions (<(...)), separated by a..
Of course you can pipe the result into other commands.
Also, note that you can always pipe the output of commands, even if they are in a loop, as in this other answer you have. E.g. try
while ... do ... done <file | cat -
For convenience, you can define a function and make it available to your environment (e.g. defining it in your .bashrc if you use bash).
An example, here using loops to minimize the need for external tools:
function cart_prod () {
while IFS= read -r line1; do
while IFS= read -r line2; do
printf '%s.%sn' "$line1" "$line2"
done <"$2"
done <"$1"
}
Sample usage:
$ cart_prod file1.txt file2.txt | sort -r
cc.site.com
cc.site3.com
cc.site2.com
bb.site.com
bb.site3.com
bb.site2.com
aa.site.com
aa.site3.com
aa.site2.com
answered Jan 12 at 11:08
fra-sanfra-san
22614
The easy part is that you can use paste to merge the lines of your files. Its -d option lets you choose a delimiter (here, a .).
The hard part here is the Cartesian product. Borrowing from this answer on SO, we can come up with a command like this:
paste -d '.'
<(sed -n "$(yes 'p;' | head -n $(wc -l <file2.txt) )" file1.txt)
<(cat $(yes 'file2.txt' | head -n $(wc -l <file1.txt)))
Where we:
- Combine
yesandheadto make asedscript that will print each line offile1.txta number of times equal to the number of lines infile2.txt; - Combine
yesandheadto makecatprintfile2.txta number of times equal to the number of lines infile1.txt; - Use
pasteto merge each pair of lines printed by the two process substitutions (<(...)), separated by a..
Of course you can pipe the result into other commands.
Also, note that you can always pipe the output of commands, even if they are in a loop, as in this other answer you have. E.g. try
while ... do ... done <file | cat -
For convenience, you can define a function and make it available to your environment (e.g. defining it in your .bashrc if you use bash).
An example, here using loops to minimize the need for external tools:
function cart_prod () {
while IFS= read -r line1; do
while IFS= read -r line2; do
printf '%s.%sn' "$line1" "$line2"
done <"$2"
done <"$1"
}
Sample usage:
$ cart_prod file1.txt file2.txt | sort -r
cc.site.com
cc.site3.com
cc.site2.com
bb.site.com
bb.site3.com
bb.site2.com
aa.site.com
aa.site3.com
aa.site2.com
answered Jan 12 at 11:08
fra-sanfra-san
22614
edited Jan 13 at 11:32
answered Jan 12 at 11:08
fra-sanfra-san
22614
answered Jan 12 at 11:08
fra-sanfra-san
22614
answered Jan 12 at 11:08
fra-sanfra-san
22614
22614
add a comment |
add a comment |
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Please take a look at: What should I do when someone answers my question?
– Cyrus
Jan 13 at 12:42