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用grep -oP仅显示符合正则表达式的部分, 每个一行, 特别是在一行中有多个命中的情况

六月 28, 2023

上一篇在blkid的结果中查找UUID 时, 我们把UUID的目标正则表达式设置为 ([^-]{8}-[^-]{4}-[^-]{4}-[^-]{4}-[^-]{12}

开了warp之后不能SSH登录

一月 18, 2023

问题： Abhi, [2023/1/17 11:08] Hello, how can I use wg-quick up in my gcp server and then ssh back to it??? Abhi, [2023/1/17 11:08] I want to add warp ip in my gcp server. But when I do wg-quick up, then I am unable to ssh into server Abhi, [2023/1/17 11:09] And my open vpn stop working 这看上去和woiden当时的情况很像（开了warp以后就不能通过IPv4 SSH登录了）所以解决方案也一样：解决方案 https://github.com/crazypeace/warp.sh/blob/main/wgcf_postup_postdown.sh 原理脚本内容很简单： sed -i '/PostUp/d' /etc/wireguard/wgcf.conf sed -i '/PostDown/d' /etc/wireguard/wgcf.conf sed -i "7 s/^/PostUp = ip -4 rule add from $(ip route get 1.1.1.1 | grep -oP 'src \K\S+') lookup main\n/" /etc/wireguard/wgcf.conf sed -i "8 s/^/PostDown = ip -4 rule delete from $(ip route get 1.1.1.1 | grep -oP 'src \K\S+') lookup main\n/" /etc/wireguard/wgcf.conf 效果就是在 wgcf.conf 文件里添加两行： PostUp = ip -4 rule add from 192.168.0.6 lookup main PostDown = ip -4 rule delete from 192.168.0.6 lookup main (上面这个例子是woiden里面跑起来的效

Shell在ping的结果中grep过滤IP地址 IPv4 IPv6

十一月 08, 2022

IPv4的正则表达式 [0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3} 获得IPv4地址 ping 域名 - 4 -c 1 -W 2 | head -1 | grep -oP ' [0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3} ' | head -1 各个命令的意义就不啰嗦了，都可以查得到。先说说 head -1 相当于 head -n 1 再说说为什么最后还要有个 head -1 因为如果结果是下面这样的话，grep -o 会得到2条结果 IPv6的正则表达式 ((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\