bash、查找、执行和回声
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bash, find, exec and echo
提问by Roberto
find . \
-name 'user_prefs' \
-exec echo "whitelist_from [email protected]" >> {} \;'
I would like to add the line whitelist_from [email protected]to all files that are found by find, but my command does not work.
It just creates the file '{}'.
我想将该行添加whitelist_from [email protected]到由 找到的所有文件中find，但我的命令不起作用。它只是创建文件“{}”。
Shoud i use the forcommand?
我应该使用for命令吗？
thanks!
谢谢！
回答by Balázs Pozsár
You have to escape the '>>', for example like this:
您必须转义“>>”，例如像这样：
find . -name 'user_prefs' -exec sh -c 'echo "whitelist_from [email protected]" >> {}' \;
回答by Balázs Pozsár
As said already, using xargs is encouraged, but you can also avoid executing sh many times by:
如前所述，鼓励使用 xargs，但您也可以通过以下方式避免多次执行 sh：
find . -name 'user_prefs' | while read filename; do echo "whitelist_from [email protected]" >>"$filename"; done
