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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The -d option simply means 'delete'.8 pin wire harness for mercury diagram base website for mercury
Most modern versions also contain predefined macros to transform upper to lower, lower to upper, kill white space, etc. Explanation: Since quotes are already understood by the shell you can ask the shell to evaluate a command that just echos the quoted string, the same way it does when you type it yourself. That's what eval does: it takes its input and runs it like a shell command. Just stumbled upon this as well. To get it to work for all cases requested and a few others, I came up with this tested with bash and dash :.
It works by striping the front and back character if they are the same and if they are ' or ". Learn more. Asked 10 years, 11 months ago.
Active 8 months ago. Viewed 35k times. Jason Jason. Active Oldest Votes. Just go changing the requirements after the coding is done ;- updated for that case.Very high net worth
I hate regular expressions now. Much more harmful codes could be injected here. I added some explanation and modernized the example a bit. You probably want to use sed Varkhan Varkhan It fails in a few cases. This is very close, but just a teeny bit off. Working on it Also, quote your parameter expansion. Just using Bash builtins i. To get it to work for all cases requested and a few others, I came up with this tested with bash and dash :!
If unspecified or an empty string, the length of the rest of the string is used. Jelle Geerts Jelle Geerts 6 6 silver badges 10 10 bronze badges. Even though python is shipped with most of the commonly used distros, it is certainly not standard.
If you install a basic Debian system, for example, it doesn't include python. Sign up or log in Sign up using Google.
The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I want to run a command from a bash script which has single quotes and some other commands inside the single quotes and a variable. Word concatenation is simply done by juxtaposition. As you can verify, each of the above lines is a single word to the shell.
Quotes single or double quotes, depending on the situation don't isolate words.Reaper analog theme
For a good tutorial on quoting see Mark Reed's answer. Also relevant: Which characters need to be escaped in bash? You should absolutely avoid building shell commands by concatenating variables. Usually it is possible to have placeholders in the command, and to supply the command together with variables so that the callee can receive them from the invocation arguments list.
Instead of the above invocation, use positional arguments. The following invocation is better -- it's not exploitable:.
Note the use of single ticks in the assignment to scriptwhich means that it's taken literally, without variable expansion or any other form of interpretation. The repo command can't care what kind of quotes it gets. If you need parameter expansion, use double quotes. If that means you wind up having to backslash a lot of stuff, use single quotes for most of it, and then break out of them and go into doubles for the part where you need the expansion to happen. When you run a command from the shell, what that command receives as arguments is an array of null-terminated strings.
Those strings may contain absolutely any non-null character.
Shell Programming and Scripting
But when the shell is building that array of strings from a command line, it interprets some characters specially; this is designed to make commands easier indeed, possible to type. For instance, spaces normally indicate the boundary between strings in the array; for that reason, the individual arguments are sometimes called "words".
But an argument may nonetheless have spaces in it; you just need some way to tell the shell that's what you want. You can use a backslash in front of any character including space, or another backslash to tell the shell to treat that character literally. But while you can do something like this:. So the shell offers an alternative: quotation marks. These come in two main varieties.Solve Double Quotes Issue When Copying From Excel Contents
Double-quotation marks are called "grouping quotes".Today's Posts. Quick Links. Search Forums. Show Threads. Show Posts. Shell Programming and Scripting. Printing double quotes in echo command. Registered User. Join Date: Oct Please help me to use echo or printf type of command to print some value from variable within double quotes - I want to print the double quote " " also.
HTML Code:. Join Date: Nov The single quotes are preventing variable expansion. Try: Code :. Code :. Got the answer from other threads. Moderator Emeritus.6488 solved assignment
Join Date: May Or Code :. I need to replace consecutive double quotes in a csv file, the data in the file is enclosed in double quotes but there are some places where the quotes are repeating Example is below Incoming data is : "Pacific Region" "PNG" "Jimmy"" "" Need output as: "Pacific Replace Double quotes within double quotes in a column with space while loading a CSV file.
Hi All, I'm unable to load the data using sql loader where there are double quotes within the double quotes As these are optionally enclosed by double quotes. Sample Data : "", Double quotes and variable proble in echo. HiI have a script to update firefox proxy.Tag: bash. I'd like to extract then substitute on a string. Is there a way to do this in the same command? The sort program opens Try this: find. Using sqlite3 from bash on OS X seems fairly straightforward I'm no expert at this, by the way.
You will need to find out which table you need. You can do this with an interactive session. I would simply start the tail in background and the python process in foreground. When the python process finishes you can kill the tail, like this:! Your variable is still within single quote hence not getting expanded. Put the original binary Turns out the code wasn't invalid had to correct some quoting issues but that the folder was corrupt when i tried to use it in the bash script.Emsen mils wesib
Here is the working code with the correct double quotes around the directory variables. The problem is you are using -c to cut. Don't do that. Use the -f and -d flags instead to control the delimiter and fields to output. Or use awk -F. For directories, use -d. This isn't the shortest method, but it doesn't require any external processes.
As indicated in the comments, you need to provide "something" to your while loop. The while construct is written in a way that will execute with a condition; if a file is given, it will proceed until the read exhausts.
I am trying to escape double quotes when adding content from statusfile. I you just want to insert a backslash in front of the double quote you could go with sed like this:. But if there is to be real escaping going on there is other tools and techniques that should be considered.M com project topics in marketing pdf
This will handle all special chars:. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. How can I escape double quotes in content gotten from file Ask Question. Asked 2 years, 11 months ago. Active 2 years, 11 months ago.
Viewed 7k times. I have looked around and are just getting more confused. How would you achieve it? This is what I got so far:! Cudos Cudos 1 1 gold badge 6 6 silver badges 16 16 bronze badges. Please show us examples of your input and the expected output. Active Oldest Votes. UlfR UlfR 1 1 silver badge 7 7 bronze badges. BTW, I agree with the note about "real escaping"; this sounds suspiciously like a partial solution to a larger problem.
If the string will be interpreted by something other than bash even a different shellthat will sometimes produce completely inappropriate output. Sign up or log in Sign up using Google. Sign up using Facebook.Today's Posts. Quick Links. Search Forums. Show Threads. Show Posts. Shell Programming and Scripting. Double Quotes within a variable. Registered User. Join Date: Dec This is a totally dumb newbie question, but I have not been able to find t he answer in the BASH book or online.
I am trying pass a double quoted variable to the command line. Any input is appreciated! Administrator Emeritus. Join Date: Aug Code :. It echos fine but does not run fine. You have to run it in a script. Ignore the ldap error this is just an example of how BASH add single quote when the command is run.
Join Date: Sep I may have misunderstood your problem and I've gone a bit 'quote-blind' looking at your output, but it seems to me the single quotes are there because you're running the script in debug mode and the shell is using them to explain what is being echoed. Or have I missed the point? I think you might be right. Below are the results from the actual script. The thing that screws me up is i CAN copy the echoed command into the command prompt and it works.
I am at a loss. The single quote in the debug lines make no sense though. Spaces in double quotes in variable? Hi got this issue and was wondering if someone could please help out? Replace Double quotes within double quotes in a column with space while loading a CSV file. Hi All, I'm unable to load the data using sql loader where there are double quotes within the double quotes As these are optionally enclosed by double quotes.
Sample Data : "", How to pass two words within double quotes as variable?
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up. I am trying to load a JSON file using jq per here. It is quite straightforward and this works:. However, I need to assign the output of this variable to a command. I tried to do this and this works:. You can use the tr command to remove the quotes:. In the particular case of jqyou can specify that the output should be in raw format:. To illustrate using the sample json.
Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 2 years, 4 months ago. Active 1 year, 5 months ago. Viewed 15k times. How do I remove the quotes, i. Active Oldest Votes. Florian Diesch Florian Diesch 72k 17 17 gold badges silver badges bronze badges. Thank you for the tr command You have the correct and probably modern solution. Agnel Vishal Agnel Vishal 1 1 bronze badge. Sign up or log in Sign up using Google.
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