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What is the difference between . . and source? When the script is done, any changes that it made to the environment are discarded script The above sources the script It is as if the commands had been typed in directly Any environment changes are kept source script This also sources the script The source command is not required by POSIX and therefore is less portable than the shorter
Source vs . why different behaviour? - Unix Linux Stack Exchange source is a shell keyword that is supposed to be used like this: source file where file contains valid shell commands These shell commands will be executed in the current shell as if typed from the command line
How to compile and install programs from source That being said +1 bump for asking a common question that should be answered for all newcomers to *nix systems :) Building from source sometimes means the difference between fixing a nasty bug and just suffering until the next software release It's really not that bad, and as many here have pointed out, once you know what to look for and how to do it, fairly painless
Getting rsync to delete source files that already exist on destination As per the man page, rsync only delete the source files after all file transfers have completed on a specific run This works fine most of the time, except if the transfer is interrupted partway through due to a network failure, after a few files have already been transferred
Load variables with source with a single line scope Use a sub-shell: ( source env source script bash ) The environment inside the sub-shell is destroyed when the sub-shell terminates Or, in bash, set BASH_ENV for the script: BASH_ENV= env source script bash The BASH_ENV variable comes into effect for non-interactive shells (i e scripts) If the variable is set to the pathname of a dot-script, that dot-script will be sourced before the
From which URL does sudo apt-get source fetch the source tarball? How to tap into the exact url from where the source tarballs for ubuntu packages are downloaded, when we execute the below command? sudo apt-get source {package-name} I know that the url is derive
Why does the command source have that name? - Unix Linux Stack Exchange In that context, I’ve always thought of source as specifying the source of the commands the shell should execute (reverting to the current source once it’s finished) Bill Joy (who introduced source in the C shell) defined the command thus: The source command causes the shell to read commands from a specified file