10-06-2017
You are
- using "Arithmetic Expansion" in lieu of "Command Substitution"
- NOT expandig the variables num1 and num2
This User Gave Thanks to RudiC For This Post:
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
How would I pass awk output to a perl variable?
For example, I want to save the value in the 4th column into the variable called test. My best guess is something as follow, but I am sure this isn't correct.
$test = system("awk '/NUMBER/{print \$4}' $_"); (8 Replies)
Discussion started by: userix
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2. Shell Programming and Scripting
hi all i am trying to save an awk value into an array in bash:
total=`awk '{sum+=$3} END {print sum}' "$count".txt"`
((count++))
the above statement is in a while loop..
$count is to keep track of file numbers (1.txt,2.txt,3.txt,etc.)
i get the following error:
./lines1:... (1 Reply)
Discussion started by: npatwardhan
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3. UNIX for Dummies Questions & Answers
Hello,
I have a shell script containing a command string in the following format:
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I need to capture the homedir using the ssh command and then saving it to a variable.
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Hi,
I have problems when you save a variable of a command. I have put the following line:
CONEXION_BAGDAD = $ (grep-c "Please login with USER and PASS" $ LOG_FILE_BAGDAD)
But I returned the following error:
syntax error at line 67: `CONEXION_BAGDAD = $ 'unexpected
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i want to retrieve value in each column of each row in sql plus
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7. Shell Programming and Scripting
Hello,
Although I have found similar questions, I could not find advice that could help with our problem.
The issue:
We have a few thousands text files (books).
Each book has many chapters. Each chapter is identified by a cite-key. We need
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8. Shell Programming and Scripting
My .bash_profile file: source $HOME/build.variables My build.variables file: export threads="$(${threads:-$(lscpu | egrep "CPU\(s\):|Thread" | $]\)\n.
*Thread.*\(]\)@\1*\2@;Ta")])})"threads=$(lscpu | egrep "CPU\(s\):|Thread" | $]\)\n.*Thread.*\(]\)@\1*\2@;Ta")The above codes when not comment out... (7 Replies)
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9. Shell Programming and Scripting
So, I've been playing with speeding up some analysis we do by using multiple threads of awk (actually, mawk, but code-compatible as far as I use it) on multiple CPU cores. So, I have a big data file and I have several copies of exactly the same processor script, written in mawk. I also have a... (8 Replies)
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LEARN ABOUT LINUX
npm-run-script
NPM-RUN-SCRIPT(1) NPM-RUN-SCRIPT(1)
NAME
npm-run-script - Run arbitrary package scripts
SYNOPSIS
npm run-script <command> [--silent] [-- <args>...]
alias: npm run
DESCRIPTION
This runs an arbitrary command from a package's "scripts" object. If no "command" is provided, it will list the available scripts.
run[-script] is used by the test, start, restart, and stop commands, but can be called directly, as well. When the scripts in the package
are printed out, they're separated into lifecycle (test, start, restart) and directly-run scripts.
As of ` https://blog.npmjs.org/post/98131109725/npm-2-0-0, you can use custom arguments when executing scripts. The special option -- is
used by getopt https://goo.gl/KxMmtG to delimit the end of the options. npm will pass all the arguments after the -- directly to your
script:
npm run test -- --grep="pattern"
The arguments will only be passed to the script specified after npm run and not to any pre or post script.
The env script is a special built-in command that can be used to list environment variables that will be available to the script at run-
time. If an "env" command is defined in your package, it will take precedence over the built-in.
In addition to the shell's pre-existing PATH, npm run adds node_modules/.bin to the PATH provided to scripts. Any binaries provided by
locally-installed dependencies can be used without the node_modules/.bin prefix. For example, if there is a devDependency on tap in your
package, you should write:
"scripts": {"test": "tap test/*.js"}
instead of
"scripts": {"test": "node_modules/.bin/tap test/*.js"}
to run your tests.
The actual shell your script is run within is platform dependent. By default, on Unix-like systems it is the /bin/sh command, on Windows it
is the cmd.exe. The actual shell referred to by /bin/sh also depends on the system. As of `
https://github.com/npm/npm/releases/tag/v5.1.0 you can customize the shell with the script-shell configuration.
Scripts are run from the root of the module, regardless of what your current working directory is when you call npm run. If you want your
script to use different behavior based on what subdirectory you're in, you can use the INIT_CWD environment variable, which holds the full
path you were in when you ran npm run.
npm run sets the NODE environment variable to the node executable with which npm is executed. Also, if the --scripts-prepend-node-path is
passed, the directory within which node resides is added to the PATH. If --scripts-prepend-node-path=auto is passed (which has been the
default in npm v3), this is only performed when that node executable is not found in the PATH.
If you try to run a script without having a node_modules directory and it fails, you will be given a warning to run npm install, just in
case you've forgotten.
You can use the --silent flag to prevent showing npm ERR! output on error.
You can use the --if-present flag to avoid exiting with a non-zero exit code when the script is undefined. This lets you run potentially
undefined scripts without breaking the execution chain.
SEE ALSO
o npm help 7 scripts
o npm help test
o npm help start
o npm help restart
o npm help stop
o npm help 7 config
January 2019 NPM-RUN-SCRIPT(1)