I have not found a solution for the following stupid task.
I have a file whose complete path I denote with
file_name
and two strings which are stored in variables var1 and var2.
I know that the string in var2 is inside the file file_name. I want to find and replace all the occurrences of var2 in file_name with the string in var1.
These strings contain path names. This means I have the character / inside.
Furthermore my machine is a macbook pro.
Combining many suggestions found on internet I finally tried in a terminal
sed -i "" -e "s:$var2:$var1:g" file_name
Result: file_name does not change. Any suggestion?
Is there a solution with awk?
Macs use BSD sed, not GNU sed. BSD sed does not have the -i or --in-place option. You will have to write out to a temporary file, and then move the new file in place after it is written.
Related
I need help to rename multiple files in a directory based on the delimeter.
Sample:
From
R01235-XYZ-TRAIL.PDF
TO
R01234-TRAIL.PDF
and
From
XYZ-C12345-TRAIL.PDF
TO
C12345-TRAIL.PDF
is it possible to delete based on - delimeter?
I am not specifically removing XYZ but rather remove anything before the first - and the middle occurence between two -.. XYZ is just a representation of the characters in that field.
Thanks!
I tried SED, LS, MV, I also tried RENAME but it seems not working for me.
This might work for you:
rename -n 's/XYZ-//' file
This removes XYZ- from the file name.
If this meets your requirements, remove the -n option for the renaming to take place.
On retrospect, perhaps:
rename -n 's/([A-Z][0-9]{5}-).*-/$1/;s/^.*-([A-Z][0-9]{5}-)/$1/' file
With sed:
sed -E 's/^([A-Z][0-9]{5}-).*-|^.*([A-Z][0-9]{5}-.*)/mv & \1\2/' file
Check the results and then:
sed -E 's/^([A-Z][0-9]{5}-).*-|^.*([A-Z][0-9]{5}-.*)/mv & \1\2/' file | sh
Please Note: I found other gnu implementations of this, but they don't seem to work on a mac. This question is specifically for MacOS running zsh
I'm trying to pipe some output into SED and use it to find the first jpg after a marker string.
Here is my sample .sh file:
Phrase="where is \“frankenstien\" tonight.jpg with my hamburger tomorrow.jpg"
echo $Phrase | sed 's/.*\frankenstien" \(.*\)jpg/\1/'
The marker string is “frankenstien" (WITH quotes). I would like the output to be:
tonight.jpg
But instead its
tonight.jpg with my hamburger tomorrow.
So obviously the sequence passed to SED is wrong, how should I write it so that it stops after the first jpg AND includes the ".jpg" in it? I found many examples online of similar things but they did not work for MAC running zsh. Can the same code work on macs running bash? If you only get it to work on bash that might be good enough.
Thanks!
If the first jpg, is immediately following the frankenstien string (marker), then you can modify your regex to do below. The following should work on any POSIX compliant sed as it does not involve any constructs from the GNU version
sed 's/.*\"frankenstien\" \([^ ]*\).*/\1/'
The above regex will capture the string after the marker string and up to the subsequent space following the required string and ignore the rest.
P.S. Note that the shell versions don't play a role in how your regex string is interpreted by your sed installed. Remember sed is a binary on its own and comes shipped with your native distro (GNU on Linux and BSD on MacOS). There are few features supported in one and not in the other ( GNU vs *BSD ), but as such the native shell should not come into the picture here. E.g. In MacOS, with a default shell say zsh, you can have both BSD sed (shipped default) and GNU version (installable using homebrew).
how should I write it so that it stops after the first jpg AND includes the ".jpg" in it?
Match up until a space.
sed 's/.*frankenstien" \([^ ]*\) .*/\1/' <<<"$Phrase"
Handle tab also:
sed 's/.*frankenstien" \([^[:space:]]*\)[[:space:]].*/\1/' <<<"$Phrase"
I would request some help with a basic shell script that should do the following job.
File a particular word from a given file (file path is always constant)
Backup the file
Delete the specific word or replace the word with ;
Save the file changes
Example
File Name - abc.cfg
Contains the following lines
network;private;Temp;Windows;System32
I've used the following SED command for the operation
sed -i -e "/Temp;/d" abc.cfg
The output is not as expected. The complete line is removed instead of just the word Temp;
Any help would be appreciated. Thank you
sed matches against lines, and /d is the delete directive, which is why you get a deleted line. Instead, use substitution to replace the offending word with nothing:
sed 's/Temp;//g' abc.cfg
The /g modifier means "globlal", in case the offending word appears more than once. I would hold off on the -i (inline) flag until you are sure of your command, in general, or use -i .backup.
Thank you. I used your suggestion but couldn't get through. I appreciate the input though.
I was able to achieve this using the following SED syntax
sed -e "s/Temp//g" -i.backup abc.cfg
I wanted to take the backup before the change & hence -i was helpful.
I have a *.tar.gz file that have inside occasionally some names with non ascii letters.
for example when tar encounter a file containing word: naïve it outputs: na\303\257ve
Is there any swich, or tool to convert these slashed values to a proper letter ?
http://www.gnu.org/software/tar/manual/tar.html
By default GNU tar attempts to unquote each file or member name, replacing escape sequences according to the following table: ...
This default behavior is controlled by the following command line
option:
--unquote
Enable unquoting input file or member names (default).
--no-unquote
Disable unquoting input file or member names.
In other words, see if "--no-unquote" is an option for your version of Cygwin.
PS:
Which version of Cygwin tar are you using?
The file is initially
$cat so/app.yaml
application: SO
...
I run the following command. I get an empty file.
$sed s/SO/so/ so/app.yaml > so/app.yaml
$cat so/app.yaml
$
How can you use SED to edit the file and not giving me an empty file?
$ sed -i -e's/SO/so/' so/app.yaml
The -i means in-place.
The > used in piping will open the output file when the pipes are all set up, i.e. before command execution. Thus, the input file is truncated prior to sed executing. This is a problem with all shell redirection, not just with sed.
Sheldon Young's answer shows how to use in-place editing.
You are using the wrong tool for the job. sed is a stream editor (that's why it's called sed), so it's for in-flight editing of streams in a pipe. ed OTOH is a file editor, which can do everything sed can do, except it works on files instead of streams. (Actually, it's the other way round: ed is the original utility and sed is a clone that avoids having to create temporary files for streams.)
ed works very much like sed (because sed is just a clone), but with one important difference: you can move around in files, but you can't move around in streams. So, all commands in ed take an address parameter that tells ed, where in the file to apply the command. In your case, you want to apply the command everywhere in the file, so the address parameter is just , because a,b means "from line a to line b" and the default for a is 1 (beginning-of-file) and the default for b is $ (end-of-file), so leaving them both out means "from beginning-of-file to end-of-file". Then comes the s (for substitute) and the rest looks much like sed.
So, your sed command s/SO/so/ turns into the ed command ,s/SO/so/.
And, again because ed is a file editor, and more precisely, an interactive file editor, we also need to write (w) the file and quit (q) the editor.
This is how it looks in its entirety:
ed -- so/app.yaml <<-HERE
,s/SO/so/
w
q
HERE
See also my answer to a similar question.
What happens in your case, is that executing a pipeline is a two-stage process: first construct the pipeline, then run it. > means "open the file, truncate it, and connect it to filedescriptor 1 (stdout)". Only then is the pipe actually run, i.e. sed is executed, but at this time, the file has already been truncated.
Some versions of sed also have a -i parameter for in-place editing of files, that makes sed behave a little more like ed, but using that is not advisable: first of all, it doesn't support all the features of ed, but more importantly, it is a non-standardized proprietary extension of GNU sed that doesn't work on many non-GNU systems. It's been a while since I used a non-GNU system, but last I used one, neither Solaris nor OpenBSD nor HP-UX nor IBM AIX sed supported the -i parameter.
I believe that redirecting output into the same file you are editing is causing your problem.
You need redirect standard output to some temporary file and when sed is done overwrite the original file by the temporary one.