echo

问题 Building docker image fails on copy task. No such file or directory. I am using the hello world example from spring Building from openjdk:8-jdk-alpine Run echo ${PWD} prints / Run ls prints a set of normal directories (/usr /var etc) but no project files are present Why is docker not using the WORKING directory? FROM openjdk:8-jdk-alpine VOLUME /tmp ARG DEPENDENCY=target/dependency COPY ${DEPENDENCY}/BOOT-INF/lib /app/lib COPY ${DEPENDENCY}/META-INF /app/META-INF COPY ${DEPENDENCY}/BOOT-INF

问题 Building docker image fails on copy task. No such file or directory. I am using the hello world example from spring Building from openjdk:8-jdk-alpine Run echo ${PWD} prints / Run ls prints a set of normal directories (/usr /var etc) but no project files are present Why is docker not using the WORKING directory? FROM openjdk:8-jdk-alpine VOLUME /tmp ARG DEPENDENCY=target/dependency COPY ${DEPENDENCY}/BOOT-INF/lib /app/lib COPY ${DEPENDENCY}/META-INF /app/META-INF COPY ${DEPENDENCY}/BOOT-INF

问题 Building docker image fails on copy task. No such file or directory. I am using the hello world example from spring Building from openjdk:8-jdk-alpine Run echo ${PWD} prints / Run ls prints a set of normal directories (/usr /var etc) but no project files are present Why is docker not using the WORKING directory? FROM openjdk:8-jdk-alpine VOLUME /tmp ARG DEPENDENCY=target/dependency COPY ${DEPENDENCY}/BOOT-INF/lib /app/lib COPY ${DEPENDENCY}/META-INF /app/META-INF COPY ${DEPENDENCY}/BOOT-INF

来源： https://stackoverflow.com/questions/55125346/windows-batch-file-how-to-enable-inline-echo-of-a-command

问题 This question already has answers here : How to append output to the end of a text file (10 answers) Closed 3 years ago . If I'm in terminal and I write some basic string to a file, is there a way to continually append to that file using echo? For instance, echo 'hello' > file will put 'hello' into that file, but what if I now want to append ' world' to file? I know that if I do echo ' world', it'll overwrite the first string I wrote into file. Is there any += operator I can use in bash? EDIT

问题 This question already has answers here : How to append output to the end of a text file (10 answers) Closed 3 years ago . If I'm in terminal and I write some basic string to a file, is there a way to continually append to that file using echo? For instance, echo 'hello' > file will put 'hello' into that file, but what if I now want to append ' world' to file? I know that if I do echo ' world', it'll overwrite the first string I wrote into file. Is there any += operator I can use in bash? EDIT

问题 I recently upgraded maxima from 5.41.0 to 5.43.2 and it broke my code. I could not find a solution that works in both versions the same way. Here is the simplified command line example I am executing: In version 5.41.0: user@system:~> maxima -version Maxima 5.41.0 user@system:~> maxima --very-quiet -r 'display2d: false$ leftjust: true$ ratprint: false$ dispflag: false$ is(equal((a+b)**2 = (a**2 + b**2 + 2*a*b), (a+b)*(a+b) = (a**2 + b**2 + 2*a*b))); ttyoff:true$ quit()$' true user@system:~>

问题 I'm seeing one interesting behaviour with some commands which need manual interruption when piped with echo -n command. bash-3.2$ openssl OpenSSL> exit bash-3.2$ echo -n | openssl OpenSSL> bash-3.2$ bash-3.2$ telnet 10.207.139.8 22 Trying 10.207.139.8... Connected to 10.207.139.8. Escape character is '^]'. SSH-2.0-OpenSSH_7.4 ^] telnet> Connection closed. bash-3.2$ echo -n | telnet 10.207.139.8 22 Trying 10.207.139.8... Connected to 10.207.139.8. Escape character is '^]'. Connection closed by

问题 The (unofficial) documentation for the Windows Internal CMD ECHO shows some interesting tricks in it. However, I have not yet found a way to echo a single character . Quick note, od used below, is from a Git (or Gow) installation For instance, this echo's the 'a' with a 'windows' newline ( \r\n ): >echo a| od -A x -t x1z -v - 000000 61 0d 0a >a..< 000003 And this trick (also in the docs now) echo's nothing: ><nul (set/p _any_variable=)| od -A x -t x1z -v - 000000 So I would expect this to

问题 Local websockets is running like a charm but on production I keep getting the error in the title. Some background information I'm using the websocket package: beyondcode/laravel-websockets. I'm running 'php artisan websockets:serve --port=6004' with supervisor. I also made sure port 6004 is open. In production I tried the settings with and without SSL both gave the error in the title. Settings with SSL: My echo settings: window.Echo = new Echo({ broadcaster: 'pusher', key: process.env.MIX