Shell
Getting things done with shell - tutorials, code samples and more.
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tar and permission bits
exploring how tar deals with uid and gids when archiving and extracting under different types of users
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Passing the results of a command as a file to another script
Bash process substitution can make you not depend on processes expecting input from the standard input. Learn how to supply the result of a script as a temporary filename for another command.
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Measuring HTTP response times with cURL
Without getting out of your current shell and installing other utilities, give cURL a try to measure response times - it can do it.
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Shell: replacing a variable with the contents of a file
How to create a poor man's templating engine using AWK
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Shell: how to add a prefix to the output of multiple commands
Executing multiple shell commands in continuous integration might become hard to read. Check out how to prefix command executions using bash.
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Forcing (from inside) the redirection of all outputs of a bash script to a file
Using exec to redirect force redirection from within a bash script.