我有一个正在为其编写脚本的日志文件,因此它仅显示输出的某些字段。我需要的最后一点是缩短 URL,以便当它们点击“.com”、“.edu”、“.org”等时停止该行。有没有办法用 grep 来做到这一点?我应该寻找其他命令吗?
示例输出为:
student1234 "GET https://www.noname.com:443/login"
student4567 "GET http:// www.noip.edu:80/start/noname"
student8901 "GET http:// www.testing.org:80/search/change"
我需要的是:
student1234 "GET https://www.noname.com
student4567 "GET http:// www.noip.edu
student8901 "GET http:// www.testing.org
答案1
这么多选择,选你喜欢的吧。
使用grep
:
grep -o '^[^:]\+:[^:]\+' file.txt
使用cut
:
cut -d: -f1-2 file.txt
使用awk
:
awk -F: '{ print $1$2 }' file.txt
使用sed
:
sed 's/^\([^:]\+:[^:]\+\).*/\1/' file.txt
使用外壳:
while IFS=: read -r i j k; do echo "$i$j"; done <file.txt
使用perl
:
perl -pe 's/^([^:]+:[^:]+).*/$1/' file.txt
例子:
$ grep -o '^[^:]\+:[^:]\+' file.txt
student1234 "GET https://www.noname.com
student4567 "GET http:// www.noip.edu
student8901 "GET http:// www.testing.org
$ cut -d: -f1-2 file.txt
student1234 "GET https://www.noname.com
student4567 "GET http:// www.noip.edu
student8901 "GET http:// www.testing.org
$ awk -F: '{ print $1$2 }' file.txt
student1234 "GET https//www.noname.com
student4567 "GET http// www.noip.edu
student8901 "GET http// www.testing.org
$ sed 's/^\([^:]\+:[^:]\+\).*/\1/' file.txt
student1234 "GET https://www.noname.com
student4567 "GET http:// www.noip.edu
student8901 "GET http:// www.testing.org
$ while IFS=: read -r i j k; do echo "$i$j"; done <file.txt
student1234 "GET https//www.noname.com
student4567 "GET http// www.noip.edu
student8901 "GET http// www.testing.org
$ perl -pe 's/^([^:]+:[^:]+).*/$1/' file.txt
student1234 "GET https://www.noname.com
student4567 "GET http:// www.noip.edu
student8901 "GET http:// www.testing.org