/etc/vim/vimrc setting is not reflected in the vim work.

18.04 was newly installed.
and i applied "highlight Comment temp=bold cterm=bold ctermfg=4" to the /etc/vim/vimrc but it doesn't work.
i also tried to /etc/vim/vimrc.local, but it was the same.

[ubuntu version]
root@ubuntu-18:~# lsb_release -rd
Description: Ubuntu 18.04 LTS
Release: 18.04

[vim packages]
root@ubuntu-18:~# dpkg -l | grep vim
ii vim 2:8.0.1453-1ubuntu1 amd64 Vi IMproved - enhanced vi editor
ii vim-common 2:8.0.1453-1ubuntu1 all Vi IMproved - Common files
ii vim-runtime 2:8.0.1453-1ubuntu1 all Vi IMproved - Runtime files
ii vim-tiny 2:8.0.1453-1ubuntu1 amd64 Vi IMproved - enhanced vi editor - compact version

[vim]
:script
  1: /usr/share/vim/vimrc
  2: /usr/share/vim/vim80/debian.vim
  3: /usr/share/vim/vim80/syntax/syntax.vim
  4: /usr/share/vim/vim80/syntax/synload.vim
  5: /usr/share/vim/vim80/syntax/syncolor.vim
  6: /usr/share/vim/vim80/filetype.vim
  7: /usr/share/vim/vim80/defaults.vim
  8: /usr/share/vim/vim80/syntax/nosyntax.vim
  9: /usr/share/vim/vim80/ftplugin.vim
 10: /usr/share/vim/vim80/indent.vim
 11: /usr/share/vim/vim80/plugin/getscriptPlugin.vim
 12: /usr/share/vim/vim80/plugin/gzip.vim
 13: /usr/share/vim/vim80/plugin/logiPat.vim
 14: /usr/share/vim/vim80/plugin/manpager.vim
 15: /usr/share/vim/vim80/plugin/matchparen.vim
 16: /usr/share/vim/vim80/plugin/netrwPlugin.vim
 17: /usr/share/vim/vim80/plugin/rrhelper.vim
 18: /usr/share/vim/vim80/plugin/spellfile.vim
 19: /usr/share/vim/vim80/plugin/tarPlugin.vim
 20: /usr/share/vim/vim80/plugin/tohtml.vim
 21: /usr/share/vim/vim80/plugin/vimballPlugin.vim
 22: /usr/share/vim/vim80/plugin/zipPlugin.vim
Press ENTER or type command to continue

:verbose hi
.
.
ToolbarLine xxx term=underline ctermbg=7 guibg=LightGrey
ToolbarButton xxx cterm=bold ctermfg=7 ctermbg=0 gui=bold guifg=White guibg=Grey40
Comment xxx term=bold ctermfg=4 guifg=Blue
        Last set from /usr/share/vim/vim80/syntax/syncolor.vim
.
.

[strace log]
 255 stat("/usr/share/vim/vimrc", {st_dev=makedev(8, 4), st_ino=131954, st_mode=S_IFREG|0644, st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=2518, st_atime=1525070141 /* 2018-04-30T06:35:41.781044437+0000 */, st_atime_nsec=781044437, st_mtime=1525070124 /* 2018-04-30T06:35:24.336988026+0000 */, st_mtime_nse c=336988026, st_ctime=1525070124 /* 2018-04-30T06:35:24.396988255+0000 */, st_ctime_nsec=396988255}) = 0
 256 openat(AT_FDCWD, "/usr/share/vim/vimrc", O_RDONLY) = 3
 257 fcntl(3, F_GETFD) = 0
 258 fcntl(3, F_SETFD, FD_CLOEXEC) = 0
 259 fcntl(3, F_GETFL) = 0x8000 (flags O_RDONLY|O_LARGEFILE)
 260 stat("/usr/share/vim/vimrc", {st_dev=makedev(8, 4), st_ino=131954, st_mode=S_IFREG|0644, st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=2518, st_atime=1525070141 /* 2018-04-30T06:35:41.781044437+0000 */, st_atime_nsec=781044437, st_mtime=1525070124 /* 2018-04-30T06:35:24.336988026+0000 */, st_mtime_nse c=336988026, st_ctime=1525070124 /* 2018-04-30T06:35:24.396988255+0000 */, st_ctime_nsec=396988255}) = 0

[tree]
root@ubuntu-18:/usr/share/vim# tree -L 2
.
├── addons
│   └── plugin
├── registry
│   └── vim-runtime.yaml
├── vim80
│   ├── autoload
│   ├── bugreport.vim
│   ├── colors
│   ├── compiler
│   ├── debian.vim
│   ├── defaults.vim
│   ├── delmenu.vim
│   ├── doc
│   ├── evim.vim
│   ├── filetype.vim
│   ├── ftoff.vim
│   ├── ftplugin
│   ├── ftplugin.vim
│   ├── ftplugof.vim
│   ├── gvimrc_example.vim
│   ├── indent
│   ├── indent.vim
│   ├── indoff.vim
│   ├── keymap
│   ├── lang
│   ├── macros
│   ├── menu.vim
│   ├── mswin.vim
│   ├── optwin.vim
│   ├── pack
│   ├── plugin
│   ├── print
│   ├── rgb.txt
│   ├── scripts.vim
│   ├── spell
│   ├── synmenu.vim
│   ├── syntax
│   ├── tutor
│   └── vimrc_example.vim
├── vimfiles -> /etc/vim
├── vimrc -> /etc/vim/vimrc
└── vimrc.tiny -> /etc/vim/vimrc.tiny