Let's say I have a file called File1.txt that has the string
Hamburger
And I have another file called File2.txt that has the string:
I love Pizza
I want to use the sed command to make changes such that it copies all the text from File1.txt i.e. Hamburger and replace it in File2.txt with the word Pizza so that the final output in File2.txt would be
I love Hamburger
Is there a way to do this suing the sed command ?
Here's an example of code I am trying to use but it doesn't work:
sed -e '/Hamburger/{r File1.txt' -e 'd}' File2.txt
You can try this sed
$ sed "s/Pizza/$(cat File1.txt)/" File2.txt
I love Hamburger
The question is tagged github-actions, so I am going to make some guesses.
You have a config file with some template data in it.
You want to automatically replace that with some real data that is stored in another file.
There are many ways you could do this, but here's one using envsubst
First, rewrite your template File2.txt this way
I love $Pizza
Then run this shell script:
export Pizza=$(<File1.txt)
envsubst '$Pizza' < File2.txt
This will print out the phrase you expect by expanding $Pizza within the file to the content of the corresponding environment variable, but not expanding any other things that look like environment variables.
This might work for you (GNU sed):
sed 's/.*/s#pizza#&#/' file2 | sed -f - file1
Turn file2 into a sed script and apply to file1.
Related
I need to delete from a file all the words that do not contain any uppercase in bash.
I use the sed command but the output is the same as the input:
I tried sed 's/[^0-9]*//' file
Example input:
sjasd
ksaLK
asdn
Asdw
Output
ksaLK
Asdw
Could you please try following.
sed -n '/[A-Z]/p' Input_file
As per #PaulHodges's comment, once you are happy with results use sed -i .... option in above code to make changes in Input_file itself.
To make a file without those:
grep '[A-Z]' infile > outfile
This is a nondestructive way to check first. Then you could replace the old file with the new one.
If you really want to edit the existing file in place:
sed -i '/[A-Z]/!d' infile
This says to delete all lines that do not have a capital letter.
My text file contains 100 lines and the text file surely contains Technology and /Technology words .In which ,I want to remove Technology and /Technology words present in the file using shell scripting.
sed -i.bak -e 's#/Technology##g' -e 's#Technology##g' my_text_file
This is delete the words and also make a backup of the original file just in case
sed -i -e 's#/Technology##g' -e 's#Technology##g' my_text_file
This will not make a backup but just modify the original file
You can try this one.
sed -r 's/<[\/]*technology>//g' a
Here is an awk
cat file
This Technology
More here
Mine /Technology must go
awk '{gsub(/\/*Technology/,"")}1' file
This
More here
Mine must go
By adding an extra space in the regex, it will not leave an extra space in the output.
awk '{gsub(/\/*Technology /,"")}1' file
This Technology
More here
Mine must go
To write back to original file
awk '{gsub(/\/*Technology /,"")}1' file > tmp && mv tmp file
If you have gnu awk 4.1+ you can do
awk -i '{gsub(/\/*Technology /,"")}1' file
I am new to shell scripting. Just wanna know how can I obtain the result I wanted with the following:
I have two files (FILE_A and FILE_B)
FILE_A contains:
09228606355,71295939,1,http://sun.net.ph/043xafj.xml,01000001C123000D30
09228505450,71295857,1,http://sun.net.ph/004xafk.xml,01000001C123000D30
FILE_B contains:
http://sun.net.ph/161ybfq.xml ,9220002354016,93111
http://sun.net.ph/004xafk.xml ,9220002354074,93111
If the URL (4th field) in FILE_A is present in FILE_B, the out will be:
09228505450,71295857,1,http://sun.net.ph/004xafk.xml,01000001C123000D30,9220002354074,93111
It will display the whole line in FILE_A and added 2nd and 3rd field of FILE_B.
I hope my question is clear. Thank you.
This might work for you (GNU sed):
sed -r 's/^\s*(\S+)\s*,(.*)/\\#^([^,]*,){3}\1#s#$#,\2#p/' fileB | sed -nrf - fileA
This builds a sed script from fileB and runs it against fileA. The second sed script is run in silent mode and only those lines that match the sed script are printed out.
Try this:
paste -d , A B | awk -F , '{if ($4==$6) print "match", $1,$2,$3,$4,$5,$7,$8;}'
I removed the spaces in your file B for the $4==$6 to work.
I use paste to create a composite line using , as the delimiter to get a line with , . I then use awk comparison to check the URLs from both files and if a match is found I print all the fields you care about.
I have a scenario where I need to substitute a variable (the same variable) in multiple files within a directory with that name of the files.
For instance, I have a list of files with identical content as such;
file1
file2
file3
file4
The contents of each of these files is;
Some Text
Another line of text
I need to replace this $variable
What I would like to do is replace all instances of the pattern $variable with the name of said file.
i.e. the contents of file1 will become
Some Text
Another line of text
I need to replace this file1
and the contents of file2 will become
Some Text
Another line of text
I need to replace this file2
I have been looking into sed and think it's probably the way to go but I've often been wrong about scripting and it certainly isn't a strong point.
You can use this for loop:
while read -r f; do
sed -i.bak "s~\$variable~$f~" "$f"
done < <(grep -l '\$variable' file*)
Change glob pattern file* to * if you want to do this for each file in the directory.
Using GNU awk for inplace editing and word anchors:
awk -i inplace '{gsub(/\<\$variable\>/,FILENAME); print}' file*
The above will fail for file names containing & or \\<number>. If that's a problem the solution is to use match() or index() with substr() instead of a gsub().
I recently wrote a script that does a sed command, to replace all the occurrences of "string1" with "string2" in a file named "test.txt".
It looks like this:
sed -i 's/string1/string2/g' test.txt
The catch is, "string1" does not necessarily exist in test.txt.
I notice after executing a bunch of these sed commands, I get a number of empty files, left behind in the directory, with names that look like this:
"sed4l4DpD"
Does anyone know why this might be, and how I can correct it?
-i is the suffix given to the new/output file. Also, you need -e for the command.
Here's how you use it:
sed -i '2' -e 's/string1/string2/g' test.txt
This will create a file called test.txt2 that is the backup of test.txt
To replace the file (instead of creating a new copy - called an "in-place" substitution), change the -i value to '' (ie blank):
sed -i '' -e 's/string1/string2/g' test.txt
EDIT II
Here's actual command line output from a Mac (Snow Leopard) that show that my modified answer (removed space from between the -i and the suffix) is correct.
NOTE: On a linux server, there must be no space between it -i and the suffix.
> echo "this is a test" > test.txt
> cat test.txt
this is a test
> sed -i '2' -e 's/a/a good/' test.txt
> ls test*
test.txt test.txt2
> cat test.txt
this is a good test
> cat test.txt2
this is a test
> sed -i '' -e 's/a/a really/' test.txt
> ls test*
test.txt test.txt2
> cat test.txt
this is a really good test
I wasn't able to reproduce this with a quick test (using GNU sed 4.2.1) -- but strace did show sed creating a file called sedJd9Cuy and then renaming it to tmp (the file named on the command line).
It looks like something is going wrong after sed creates the temporary file and before it's able to rename it.
My best guess is that you've run out of room in the filesystem; you're able to create a new empty file, but unable to write to it.
What does df . say?
EDIT:
I still don't know what's causing the problem, but it shouldn't be too difficult to work around it.
Rather than
sed -i 's/string1/string2/g' test.txt
try something like this:
sed 's/string1/string2/g' test.txt > test.txt.$$ && mv -f test.txt.$$ test.txt
Something is going wrong with the way sed creates and then renames a text file to replace your original file. The above command uses sed as a simple input-output filter and creates and renames the temporary file separately.
So after much testing last night, it turns out that sed was creating these files when trying to operate on an empty string. The way i was getting the array of "$string1" arguments was through a grep command, which seems to be malformed. What I wanted from the grep was all lines containing something of the type "Text here '.'".
For example the string, "Text here 'ABC.DEF'" in a file, should have been caught by grep, then the ABC.DEF portion of the string, would be substituted by ABC_DEF. Unfortunately the grep I was using would catch lines of the type "Text here ''" (that is, nothing between the ''). When later on, the script attempted to perform a sed replacement using this empty string, the random file was created (probably because sed died).
Thanks for all your help in understanding how sed works.
Its better if you do it in this way:
cat large_file | sed 's/string1/string2/g' > file_filtred