sudo apt-get install libxml2-dev libonig-dev


Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  gir1.2-harfbuzz-0.0 icu-devtools libglib2.0-dev libglib2.0-dev-bin libgraphite2-dev libharfbuzz-dev libharfbuzz-gobject0 libicu-dev libicu-le-hb-dev libicu-le-hb0 libiculx60 libonig4 libpcre16-3
  libpcre3-dev libpcre32-3 libpcrecpp0v5 pkg-config python3-distutils python3-lib2to3 zlib1g-dev
Suggested packages:
  libglib2.0-doc libgraphite2-utils icu-doc
The following NEW packages will be installed:
  gir1.2-harfbuzz-0.0 icu-devtools libglib2.0-dev libglib2.0-dev-bin libgraphite2-dev libharfbuzz-dev libharfbuzz-gobject0 libicu-dev libicu-le-hb-dev libicu-le-hb0 libiculx60 libonig-dev libonig4
  libpcre16-3 libpcre3-dev libpcre32-3 libpcrecpp0v5 libxml2-dev pkg-config python3-distutils python3-lib2to3 zlib1g-dev
0 upgraded, 22 newly installed, 0 to remove and 6 not upgraded.
Need to get 537 kB/13.2 MB of archives.
After this operation, 64.4 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Err:1 http://archive.ubuntu.com/ubuntu bionic/main amd64 libpcre3-dev amd64 2:8.39-9
  Connection failed [IP: 91.189.91.23 80]
E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/p/pcre3/libpcre3-dev_8.39-9_amd64.deb  Connection failed [IP: 91.189.91.23 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?