$ grep -oP 'foobar \K\w+' test.txt
bash
happy
[......]
grep如何只打印匹配部分
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$ grep -oP 'foobar \K\w+' test.txt
bash
happy
[......]
usermod -a -G group_name user_name
[......]
sudo add-apt-repository ppa:webupd8team/java
sudo apt update
sudo apt install oracle-java8-installer
sudo apt install oracle-java8-set-default
[......]
nginxconfig.io[......]
ll | xclip -i
然后用鼠标中键粘帖[......]