bash sed 命令将文本行添加到文件的最后
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Sed command to add line of text to the very end of a file
提问by Technic1an
I want to use sed to add a line of text to the very end of a file. In this case I am working on OS X and I want to add a line in the /etc/sudoers files. I want my string to be the last string in the file on its own line. Any ideas?
我想使用 sed 在文件的最后添加一行文本。在这种情况下，我在 OS X 上工作，我想在 /etc/sudoers 文件中添加一行。我希望我的字符串成为文件中单独一行的最后一个字符串。有任何想法吗？
Example:
例子：
text
text
text
<my string>
Thanks.
谢谢。
回答by Eric Renouf
If you can do it without sed it would be easy enough to do echo <line> >> /etc/sudoers(though be careful that you have a valid line!).
如果你不用 sed 就可以做到，那将很容易做到echo <line> >> /etc/sudoers（但要注意你有一个有效的行！）。
If you want do it with sed you could do sed -i -e '$a<line>' /etc/sudoersto go to the last line then append your text.
如果你想用 sed 来做sed -i -e '$a<line>' /etc/sudoers，你可以转到最后一行，然后附加你的文本。
回答by ctt
Consider using echoand output redirection:
考虑使用echo和输出重定向：
sudo sh -c "echo 'my string' >> /etc/sudoers"
.
.
回答by Jotne
You can use awk
您可以使用 awk
awk '1; END {print "text to add"}' file > tmp && mv tmp file
This will add text to addas a new line at the end of file file
这将text to add在文件末尾添加一个新行file
回答by Saumyadip Pramanik
I have also tried to achieve this using sed, but unfortunately, haven't found any solution yet. But I have found a workaround to achieve this using echo:
我也尝试过使用 sed 来实现这一点，但不幸的是，还没有找到任何解决方案。但是我找到了一种解决方法来使用 echo 实现这一点：
$ echo "the line you want to add" >> yourTextFile.txt
$ echo "您要添加的行" >> yourTextFile.txt
