diff --git a/BUILD.gn b/BUILD.gn
index 364c3fc0dda499d363a7d939b6b05e65170c5d1e..80b93f51abfc99ccd39a0aa695f74fb39d23c443 100755
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -22,6 +22,75 @@ version_info = [
 ]
 write_file("$root_build_dir/etc/version-info", version_info)
 
+# write /etc/hosts
+etc_hosts = [
+  "127.0.0.1 localhost",
+  "192.168.1.10 www.sample.com",
+]
+write_file("$root_build_dir/etc/hosts", etc_hosts)
+
+# write /etc/group.
+etc_group = [
+  "root:x:0:",
+  "daemon:x:1:",
+  "bin:x:2:",
+  "sys:x:3:",
+  "adm:x:4:syslog,teamol",
+  "tty:x:5:",
+  "disk:x:6:",
+  "lp:x:7:",
+  "mail:x:8:",
+  "news:x:9:",
+  "uucp:x:10:",
+  "man:x:12:",
+  "proxy:x:13:",
+  "users:x:100:",
+  "nogroup:x:65534:",
+  "crontab:x:105:",
+  "syslog:x:106:",
+  "uuidd:x:110:",
+  "ssh:x:111:",
+  "teamol:x:1000:",
+  "ntp:x:113:",
+]
+write_file("$root_build_dir/etc/group", etc_group)
+
+# write /etc/passwd.
+etc_passwd = [
+  "root:x:0:0:root:/root:/bin/bash",
+  "daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin",
+  "bin:x:2:2:bin:/bin:/usr/sbin/nologin",
+  "sys:x:3:3:sys:/dev:/usr/sbin/nologin",
+  "sync:x:4:65534:sync:/bin:/bin/sync",
+  "games:x:5:60:games:/usr/games:/usr/sbin/nologin",
+  "man:x:6:12:man:/var/cache/man:/usr/sbin/nologin",
+  "lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin",
+  "mail:x:8:8:mail:/var/mail:/usr/sbin/nologin",
+  "news:x:9:9:news:/var/spool/news:/usr/sbin/nologin",
+  "uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin",
+  "proxy:x:13:13:proxy:/bin:/usr/sbin/nologin",
+  "www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin",
+  "backup:x:34:34:backup:/var/backups:/usr/sbin/nologin",
+  "list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin",
+  "irc:x:39:39:ircd:/var/run/ircd:/usr/sbin/nologin",
+  "gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin",
+  "nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin",
+  "systemd-network:x:100:102:systemd Network Management,,,:/run/systemd/netif:/usr/sbin/nologin",
+  "systemd-resolve:x:101:103:systemd Resolver,,,:/run/systemd/resolve:/usr/sbin/nologin",
+  "syslog:x:102:106::/home/syslog:/usr/sbin/nologin",
+  "messagebus:x:103:107::/nonexistent:/usr/sbin/nologin",
+  "_apt:x:104:65534::/nonexistent:/usr/sbin/nologin",
+  "lxd:x:105:65534::/var/lib/lxd/:/bin/false",
+  "uuidd:x:106:110::/run/uuidd:/usr/sbin/nologin",
+  "dnsmasq:x:107:65534:dnsmasq,,,:/var/lib/misc:/usr/sbin/nologin",
+  "landscape:x:108:112::/var/lib/landscape:/usr/sbin/nologin",
+  "pollinate:x:109:1::/var/cache/pollinate:/bin/false",
+  "teamol:x:1000:1000:gu:/teamol/teamol:/bin/bash",
+  "sshd:x:110:65534::/run/sshd:/usr/sbin/nologin",
+  "ntp:x:111:113::/nonexistent:/usr/sbin/nologin",
+]
+write_file("$root_build_dir/etc/passwd", etc_passwd)
+
 # this group will mark the dependent target as prebuilts
 group("mark_as_prebuilts") {
 }