问题
I would like to concatenate a number of text files into one large file in terminal. I know I can do this using the cat command. However, I would like the filename of each file to precede the "data dump" for that file. Anyone know how to do this?
what I currently have:
file1.txt = bluemoongoodbeer
file2.txt = awesomepossum
file3.txt = hownowbrowncow
cat file1.txt file2.txt file3.txt
desired output:
file1
bluemoongoodbeer
file2
awesomepossum
file3
hownowbrowncow
回答1:
Was looking for the same thing, and found this to suggest:
tail -n +1 file1.txt file2.txt file3.txt
Output:
==> file1.txt <==
<contents of file1.txt>
==> file2.txt <==
<contents of file2.txt>
==> file3.txt <==
<contents of file3.txt>
If there is only a single file then the header will not be printed. If using GNU utils, you can use -v to always print a header.
回答2:
I used grep for something similar:
grep "" *.txt
It does not give you a 'header', but prefixes every line with the filename.
回答3:
This should do the trick as well:
find . -type f -print -exec cat {} \;
Means:
find = linux `find` command finds filenames, see `man find` for more info
. = in current directory
-type f = only files, not directories
-print = show found file
-exec = additionally execute another linux command
cat = linux `cat` command, see `man cat`, displays file contents
{} = placeholder for the currently found filename
\; = tell `find` command that it ends now here
You further can combine searches trough boolean operators like -and or -or. find -ls is nice, too.
回答4:
This should do the trick:
for filename in file1.txt file2.txt file3.txt; do
echo "$filename"
cat "$filename"
done > output.txt
or to do this for all text files recursively:
find . -type f -name '*.txt' -print | while read filename; do
echo "$filename"
cat "$filename"
done > output.txt
回答5:
I had a series of files that ended in stats.txt that I wanted to concatenate with the filenames.
I did the following and when there is more than one file, the "more" command includes the filename as a header.
more *stats.txt > stats.txt
or for a general case
more FILES_TO_CONCAT > OUTPUT_FILE
回答6:
find . -type f -print0 | xargs -0 -I % sh -c 'echo %; cat %'
This will print the full filename (including path), then the contents of the file. It is also very flexible, as you can use -name "expr" for the find command, and run as many commands as you like on the files.
回答7:
I like this option
for x in $(ls ./*.php); do echo $x; cat $x | grep -i 'menuItem'; done
Output looks like this:
./debug-things.php
./Facebook.Pixel.Code.php
./footer.trusted.seller.items.php
./GoogleAnalytics.php
./JivositeCode.php
./Live-Messenger.php
./mPopex.php
./NOTIFICATIONS-box.php
./reviewPopUp_Frame.php
$('#top-nav-scroller-pos-<?=$active**MenuItem**;?>').addClass('active');
gotTo**MenuItem**();
./Reviews-Frames-PopUps.php
./social.media.login.btns.php
./social-side-bar.php
./staticWalletsAlerst.php
./tmp-fix.php
./top-nav-scroller.php
$active**MenuItem** = '0';
$active**MenuItem** = '1';
$active**MenuItem** = '2';
$active**MenuItem** = '3';
./Waiting-Overlay.php
./Yandex.Metrika.php
回答8:
This is how I normally handle formatting like that:
for i in *; do echo "$i"; echo ; cat "$i"; echo ; done ;
I generally pipe the cat into a grep for specific information.
回答9:
you can use this simple command instead of using a for loop,
ls -ltr | awk '{print $9}' | xargs head
回答10:
If you like colors, try this:
for i in *; do echo; echo $'\e[33;1m'$i$'\e[0m'; cat $i; done | less -R
or:
tail -n +1 * | grep -e $ -e '==.*'
or: (with package 'multitail' installed)
multitail *
回答11:
And the missing awk solution is:
$ awk '(FNR==1){print ">> " FILENAME " <<"}1' *
回答12:
Here is a really simple way. You said you want to cat, which implies you want to view the entire file. But you also need the filename printed.
Try this
head -n99999999 * or head -n99999999 file1.txt file2.txt file3.txt
Hope that helps
回答13:
This method will print filename and then file contents:
tail -f file1.txt file2.txt
Output:
==> file1.txt <==
contents of file1.txt ...
contents of file1.txt ...
==> file2.txt <==
contents of file2.txt ...
contents of file2.txt ...
回答14:
If you want to replace those ugly ==> <== with something else
tail -n +1 *.txt | sed -e 's/==>/\n###/g' -e 's/<==/###/g' >> "files.txt"
explanation:
tail -n +1 *.txt - output all files in folder with header
sed -e 's/==>/\n###/g' -e 's/<==/###/g' - replace ==> with new line + ### and <== with just ###
>> "files.txt" - output all to a file
回答15:
If the files all have the same name or can be matched by find, you can do (e.g.):
find . -name create.sh | xargs tail -n +1
to find, show the path of and cat each file.
回答16:
find . -type f -exec cat {} \; -print
回答17:
If you want the result in the same format as your desired output you can try:
for file in `ls file{1..3}.txt`; \
do echo $file | cut -d '.' -f 1; \
cat $file ; done;
Result:
file1
bluemoongoodbeer
file2
awesomepossum
file3
hownowbrowncow
You can put echo -e before and after the cut so you have the spacing between the lines as well:
$ for file in `ls file{1..3}.txt`; do echo $file | cut -d '.' -f 1; echo -e; cat $file; echo -e ; done;
Result:
file1
bluemoongoodbeer
file2
awesomepossum
file3
hownowbrowncow
回答18:
- AIX 7.1 ksh
... glomming onto those who've already mentioned head works for some of us:
$ r head
head file*.txt
==> file1.txt <==
xxx
111
==> file2.txt <==
yyy
222
nyuk nyuk nyuk
==> file3.txt <==
zzz
$
My need is to read the first line; as noted, if you want more than 10 lines, you'll have to add options (head -9999, etc).
Sorry for posting a derivative comment; I don't have sufficient street cred to comment/add to someone's comment.
回答19:
For solving this tasks I usually use the following command:
$ cat file{1..3}.txt >> result.txt
It's a very convenient way to concatenate files if the number of files is quite large.
回答20:
First I created each file: echo 'information' > file1.txt for each file[123].txt.
Then I printed each file to makes sure information was correct: tail file?.txt
Then I did this: tail file?.txt >> Mainfile.txt. This created the Mainfile.txt to store the information in each file into a main file.
cat Mainfile.txt confirmed it was okay.
==> file1.txt <== bluemoongoodbeer
==> file2.txt <== awesomepossum
==> file3.txt <== hownowbrowncow
来源：https://stackoverflow.com/questions/5917413/concatenate-multiple-files-but-include-filename-as-section-headers