请问怎么修改只读文件etc/controlDict里的参数?
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如题，因为我现在用的openfoam是在超算中心里的模块，参数文件都是只读的。但是我想修改etc/controlDict里面的mpiBufferSize这一项，不知道该怎么实现？
以前在1712（或者一些其他的版本）中是可以通过，复制一个用户自定义的controlDict文件在目录$HOME/.OpenFOAM/v1712/controlDict中，从而编辑这个文件就可以实现修改。但是在之后的1912（我现在用的版本）中这一功能好像没有了，不起作用。不知道有没有别的途径可以修改mpiBufferSize这一参数？
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https://www.openfoam.com/releases/openfoam-v1712/parallel.php
这里的一句：as a setting in the OptimisationSwitches dictionary located in the \$WM_PROJECT_DIR/etc/controlDict file, or the per-user override in the /.OpenFOAM/v1712/controlDict file or per-case override in the $FOAM_CASE/system/controlDict file
试试这个 or per-case 的方法
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谢谢回复，这个就是我之前提到的放在$HOME/.OpenFOAM/v1712/controlDict中可以覆盖etc/controlDict中的参数。但是这个功能好像只在1712，1812中有效，但是在1912版本中就不行了
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1712
Note # Many environment variables can be overridden using a <prefs.sh> file # from one of these locations: # * user-specific: # * ~/.OpenFOAM/$WM_PROJECT_VERSION # * ~/.OpenFOAM # * group-specific: # * $WM_PROJECT_SITE/site/$WM_PROJECT_VERSION # * $WM_PROJECT_SITE/site # * general: # * $WM_PROJECT_DIR/etc # # Any changes made to this bashrc file may be lost with the next upgrade.2006
Description # The OpenFOAM environment for POSIX shell (eg, bash,dash,zsh,...). # Source manually or from the ~/.bashrc or ~/.profile files. # # Most settings can be overridden with a <prefs.sh> file: # # - Base values (eg, from system admin): # - $WM_PROJECT_DIR/etc/prefs.sh # # - User or group values (first file found): # - ~/.OpenFOAM/$FOAM_API/prefs.sh # - ~/.OpenFOAM/prefs.sh # - $WM_PROJECT_SITE/$FOAM_API/etc/prefs.sh # - $WM_PROJECT_SITE/etc/prefs.sh # # Some settings can also be overridden on the command-line when # sourcing this file. For example, # # . /path/etc/bashrc WM_COMPILER=Clang WM_LABEL_SIZE=64有些变化，你试试？
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@hotairballon1997 看着我真诚的眼神，告诉我，你看了我的帖子
or per-case override in the $FOAM_CASE/system/controlDict file
