ubuntu 18.04无法定位软件包？？

Question

比如如下命令：sudo apt-get install pcre-devel
结果如下：
正在读取软件包列表... 完成
正在分析软件包的依赖关系树
正在读取状态信息... 完成
E: 无法定位软件包 pcre-devel

只要是devel的软件包都报这个错

按照网上的这些方法都不能解决：

 https://blog.csdn.net/mo3408/article/details/79934396
 https://blog.csdn.net/zhwisdom0427/article/details/72898772
 https://www.zhihu.com/question/41311332
 https://mirrors.tuna.tsinghua.edu.cn/help/ubuntu/
 
 求教各位？？

Answer 1

按照你提供的的安装包信息使用apt的搜索功能 sudo apt search libpcre 我的是ubuntu16，结果如下 clisp-module-pcre/xenial 1:2.49-9ubuntu1 amd64 clisp module that adds libpcre support libpcre++-dev/xenial 0.9.5-6.1 amd64 C++ wrapper class for pcre (development) libpcre++0/precise 0.9.5-5.1 amd64 C++ wrapper class for pcre (runtime) libpcre++0v5/xenial 0.9.5-6.1 amd64 C++ wrapper class for pcre (runtime) libpcre-ocaml/xenial 7.0.4-2build1 amd64 OCaml bindings for PCRE (runtime) libpcre-ocaml-dev/xenial 7.0.4-2build1 amd64 OCaml bindings for PCRE (Perl Compatible Regular Expression) libpcre16-3/xenial 2:8.38-3.1 amd64 Perl 5 Compatible Regular Expression Library - 16 bit runtime files libpcre2-16-0/xenial 10.21-1 amd64 New Perl Compatible Regular Expression Library - 16 bit runtime files libpcre2-32-0/xenial 10.21-1 amd64 New Perl Compatible Regular Expression Library - 32 bit runtime files libpcre2-8-0/xenial 10.21-1 amd64 New Perl Compatible Regular Expression Library- 8 bit runtime files libpcre2-dbg/xenial 10.21-1 amd64 New Perl Compatible Regular Expression Library - debug symbols libpcre2-dev/xenial 10.21-1 amd64 New Perl Compatible Regular Expression Library - development files libpcre2-posix0/xenial 10.21-1 amd64 New Perl Compatible Regular Expression Library - posix-compatible runtime files libpcre3/xenial,now 2:8.38-3.1 amd64 [installed] Perl 5 Compatible Regular Expression Library - runtime files libpcre3-dbg/xenial 2:8.38-3.1 amd64 Perl 5 Compatible Regular Expression Library - debug symbols libpcre3-dev/xenial 2:8.38-3.1 amd64 Perl 5 Compatible Regular Expression Library - development files libpcre32-3/xenial 2:8.38-3.1 amd64 Perl 5 Compatible Regular Expression Library - 32 bit runtime files libpcrecpp0/precise 8.12-4 amd64 Perl 5 Compatible Regular Expression Library - C++ runtime files libpcrecpp0v5/xenial 2:8.38-3.1 amd64 Perl 5 Compatible Regular Expression Library - C++ runtime files pcre2-utils/xenial 10.21-1 amd64 New Perl Compatible Regular Expression Library - utilities pcregrep/xenial 2:8.38-3.1 amd64 grep utility that uses perl 5 compatible regexes. 你需要安装的应该是libpcre2-dev，使用 sudo apt install libpcre2-dev