In addition, we compile every version of the application in a tagged Docker image through maven. This will start the Tomcat web server and bind the host's port to the containers port , which Tomcat listens at.
It will permanently dump Tomcat's catalina output log. It's however also possible to mount persistent storage into the container. WebCAT's settings are configured using a tomcat-style context. The context that is deployed by default is available from the git repository, you may use that as a template.
To change that configuration you can either mount a directory containing a file called ROOT. Or you create a new image based on this one, which overwrites the configuration with your context.
What is the reason for this? You could avoid the same by using intermediate file and then from intermediate to actual file or you could use tee like:.
To clarify on SMA's answer, the file is truncated because redirection is handled by the shell, which opens the file for writing before invoking the command. So you will have to use some other command for the task like tee. The answers given here are wrong. You will have a problem with truncating regardless of using the redirect or pipeline, although it may APPEAR to work sometimes, depending on size of file or length of your pipeline. It is a race condition, as the reader may have a chance to read some or all of the file before the writer starts, but the point of the pipeline is to run all these at the same time so they will be starting at the same time and the first thing tee executable will do is open the output file and truncate it in the process.
The only way you will not have a problem in this scenario is if the end of the pipeline would load the entirety of the output into memory and only write it to file on shutdown. It is unlikely to happen and defeats the point of having a pipeline.
Proper solution for making this reliable is to just write to a temp file and then rename the temp file back to original filename:. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
This plug-in provides better integration with Eclipse and the CDT. It provides a pointer template class that is instrumented to give detailed diagnostics about memory leaks, pointer-related errors, and other unwise behavior. Participate: Join our community! Learn more about our educational projects.
Use the main menu to find downloads , use our GitHub issue trackers to report bugs or request new features, or communicate with others through our forums for each project. The Linux curl command can do a whole lot more than download files. Find out what curl is capable of, and when you should use it instead of wget. People often struggle to identify the relative strengths of the wget and curl commands.
The commands do have some functional overlap. It can download files, web pages, and directories. It contains intelligent routines to traverse links in web pages and recursively download content across an entire website. It is unsurpassed as a command-line download manager. Yes, it can retrieve files, but it cannot recursively navigate a website looking for content to retrieve. What curl actually does is let you interact with remote systems by making requests to those systems, and retrieving and displaying their responses to you.
And arguably, due to its superior handling of Linux pipes, curl can be more easily integrated with other commands and scripts. The author of curl has a webpage that describes the differences he sees between curl and wget. Out of the computers used to research this article, Fedora 31 and Manjaro On Ubuntu, run this command to install it:.
The --version option makes curl report its version. It also lists all the protocols that it supports. If the file it is retrieving is a binary file, the outcome can be unpredictable.
The shell may try to interpret some of the byte values in the binary file as control characters or escape sequences. Because there is no terminal window output to display, curl outputs a set of progress information. In this example, curl detects that the output is being redirected to a file and that it is safe to generate the progress information. Double-clicking that file will open your default browser so that it displays the retrieved web page.
Note that the address in the browser address bar is a local file on this computer, not a remote website.
We can create a file by using the -o output option, and telling curl to create the file. Please help me. Can you please help me? Thanks for Web-cat, it's the best! This software has really helped out our instructors to provide consistent and timely feedback to students learning programming. It's grading schema is brutally honest, which may upset students at first, but in the long run it makes them better developers.
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