System/Kernel
mark@seventeen:~$ file /bin/bash ; uname -a ; cat /etc/*release
/bin/bash: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=6386b644ab2d987986aeb40325a787a035a4f0d8, stripped
linux seventeen 4.15.0-177-generic #186-ubuntu smp thu apr 14 20:23:07 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.6 LTS"
NAME="Ubuntu"
VERSION="18.04.6 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.6 LTS"
VERSION_ID="18.04"
home_url="https://www.ubuntu.com/"
support_url="https://help.ubuntu.com/"
bug_report_url="https://bugs.launchpad.net/ubuntu/"
privacy_policy_url="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionicUbuntu 18.04.6 LTS (Bionic Beaver)
4.15.0-177-generic
x86-64
Networks
mark@seventeen:~$ netstat -antup4
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:4873 0.0.0.0:* LISTEN -
tcp 0 0 172.18.0.1:3306 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:33323 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:110 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:143 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:6000 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:6001 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:8081 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:6002 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:6003 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:6004 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:6005 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:6006 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:6007 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:6008 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:6009 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:993 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:995 0.0.0.0:* LISTEN -
tcp 0 340 10.10.11.165:22 10.10.14.7:50914 ESTABLISHED -
udp 0 0 127.0.0.53:53 0.0.0.0:* -
udp 0 0 0.0.0.0:68 0.0.0.0:* - 127.0.0.53:53
127.0.0.1:110
127.0.0.1:143
127.0.0.1:993
127.0.0.1:995
127.0.0.1:4873
127.0.0.1:6000
127.0.0.1:6001
127.0.0.1:6002
127.0.0.1:6003
127.0.0.1:6004
127.0.0.1:6005
127.0.0.1:6006
127.0.0.1:6007
127.0.0.1:6008
127.0.0.1:6009
127.0.0.1:8081
127.0.0.1:33323
mark@seventeen:~$ arp -a
? (172.17.0.4) at 02:42:ac:11:00:04 [ether] on docker0
_gateway (10.10.10.2) at 00:50:56:b9:f3:30 [ether] on eth0mark@seventeen:~$ ifconfig | grep -i inet
inet 172.20.0.1 netmask 255.255.0.0 broadcast 172.20.255.255
inet 172.18.0.1 netmask 255.255.0.0 broadcast 172.18.255.255
inet 172.19.0.1 netmask 255.255.0.0 broadcast 172.19.255.255
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
inet 10.10.11.165 netmask 255.255.254.0 broadcast 10.10.11.255
inet 127.0.0.1 netmask 255.0.0.0Users & Groups
mark@seventeen:~$ cat /etc/passwd ; ll /home
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
sshd:x:110:65534::/run/sshd:/usr/sbin/nologin
kavi:x:1000:1000:kavi:/home/kavi:/bin/bash
mysql:x:111:114:MySQL Server,,,:/nonexistent:/bin/false
dovecot:x:112:116:Dovecot mail server,,,:/usr/lib/dovecot:/usr/sbin/nologin
dovenull:x:113:117:Dovecot login user,,,:/nonexistent:/usr/sbin/nologin
mark:x:1001:1001:,,,:/home/mark:/bin/bash
total 16
drwxr-xr-x 4 root root 4096 Apr 8 2022 ./
drwxr-xr-x 26 root root 4096 May 23 2022 ../
drwxr-x--- 7 kavi kavi 4096 May 11 2022 kavi/
drwxr-x--- 5 mark mark 4096 May 11 2022 mark/kavi
mark@seventeen:~$ cut -d: -f1 /etc/passwd | xargs -n1 id
uid=0(root) gid=0(root) groups=0(root)
uid=1(daemon) gid=1(daemon) groups=1(daemon)
uid=2(bin) gid=2(bin) groups=2(bin)
uid=3(sys) gid=3(sys) groups=3(sys)
uid=4(sync) gid=65534(nogroup) groups=65534(nogroup)
uid=5(games) gid=60(games) groups=60(games)
uid=6(man) gid=12(man) groups=12(man)
uid=7(lp) gid=7(lp) groups=7(lp)
uid=8(mail) gid=8(mail) groups=8(mail)
uid=9(news) gid=9(news) groups=9(news)
uid=10(uucp) gid=10(uucp) groups=10(uucp)
uid=13(proxy) gid=13(proxy) groups=13(proxy)
uid=33(www-data) gid=33(www-data) groups=33(www-data)
uid=34(backup) gid=34(backup) groups=34(backup)
uid=38(list) gid=38(list) groups=38(list)
uid=39(irc) gid=39(irc) groups=39(irc)
uid=41(gnats) gid=41(gnats) groups=41(gnats)
uid=65534(nobody) gid=65534(nogroup) groups=65534(nogroup)
uid=100(systemd-network) gid=102(systemd-network) groups=102(systemd-network)
uid=101(systemd-resolve) gid=103(systemd-resolve) groups=103(systemd-resolve)
uid=102(syslog) gid=106(syslog) groups=106(syslog),4(adm)
uid=103(messagebus) gid=107(messagebus) groups=107(messagebus)
uid=104(_apt) gid=65534(nogroup) groups=65534(nogroup)
uid=105(lxd) gid=65534(nogroup) groups=65534(nogroup)
uid=106(uuidd) gid=110(uuidd) groups=110(uuidd)
uid=107(dnsmasq) gid=65534(nogroup) groups=65534(nogroup)
uid=108(landscape) gid=112(landscape) groups=112(landscape)
uid=109(pollinate) gid=1(daemon) groups=1(daemon)
uid=110(sshd) gid=65534(nogroup) groups=65534(nogroup)
uid=1000(kavi) gid=1000(kavi) groups=1000(kavi)
uid=111(mysql) gid=114(mysql) groups=114(mysql)
uid=112(dovecot) gid=116(dovecot) groups=116(dovecot)
uid=113(dovenull) gid=117(dovenull) groups=117(dovenull)
uid=1001(mark) gid=1001(mark) groups=1001(mark)SUIDs
mark@seventeen:~$ find / -perm -04000 -ls -type f 2>/dev/null
261700 32 -rwsr-xr-x 1 root root 30800 Aug 11 2016 /bin/fusermount
270562 28 -rwsr-xr-x 1 root root 26696 Sep 16 2020 /bin/umount
261796 44 -rwsr-xr-x 1 root root 44664 Jan 25 2022 /bin/su
270561 44 -rwsr-xr-x 1 root root 43088 Sep 16 2020 /bin/mount
261751 64 -rwsr-xr-x 1 root root 64424 Jun 28 2019 /bin/ping
654511 76 -rwsr-xr-x 1 root root 76496 Jan 25 2022 /usr/bin/chfn
654512 44 -rwsr-xr-x 1 root root 44528 Jan 25 2022 /usr/bin/chsh
657680 40 -rwsr-xr-x 1 root root 37136 Jan 25 2022 /usr/bin/newgidmap
654514 76 -rwsr-xr-x 1 root root 75824 Jan 25 2022 /usr/bin/gpasswd
657681 40 -rwsr-xr-x 1 root root 37136 Jan 25 2022 /usr/bin/newuidmap
654784 60 -rwsr-xr-x 1 root root 59640 Jan 25 2022 /usr/bin/passwd
654950 20 -rwsr-xr-x 1 root root 18448 Jun 28 2019 /usr/bin/traceroute6.iputils
654867 40 -rwsr-xr-x 1 root root 40344 Jan 25 2022 /usr/bin/newgrp
654516 52 -rwsr-sr-x 1 daemon daemon 51464 Feb 20 2018 /usr/bin/at
656394 148 -rwsr-xr-x 1 root root 149080 Jan 19 2021 /usr/bin/sudo
655253 428 -rwsr-xr-x 1 root root 436552 Mar 30 2022 /usr/lib/openssh/ssh-keysign
9965 100 -rwsr-xr-x 1 root root 100760 Nov 23 2018 /usr/lib/x86_64-linux-gnu/lxc/lxc-user-nic
656485 16 -rwsr-xr-x 1 root root 14328 Jan 12 2022 /usr/lib/policykit-1/polkit-agent-helper-1
657513 44 -rwsr-xr-- 1 root messagebus 42992 May 6 2022 /usr/lib/dbus-1.0/dbus-daemon-launch-helper
655142 12 -rwsr-xr-x 1 root root 10232 Mar 28 2017 /usr/lib/eject/dmcrypt-get-deviceSGIDs
mark@seventeen:~$ find / -perm -02000 -ls -type f 2>/dev/null
523366 36 -rwxr-sr-x 1 root shadow 34816 Apr 8 2021 /sbin/pam_extrausers_chkpwd
523378 36 -rwxr-sr-x 1 root shadow 34816 Apr 8 2021 /sbin/unix_chkpwd
654513 24 -rwxr-sr-x 1 root shadow 22808 Jan 25 2022 /usr/bin/expiry
655247 356 -rwxr-sr-x 1 root ssh 362640 Mar 30 2022 /usr/bin/ssh-agent
654510 72 -rwxr-sr-x 1 root shadow 71816 Jan 25 2022 /usr/bin/chage
654527 16 -rwxr-sr-x 1 root tty 14328 Jan 17 2018 /usr/bin/bsd-write
663796 12 -rwxr-sr-x 1 root mail 10232 Oct 17 2019 /usr/bin/mlock
656306 32 -rwxr-sr-x 1 root tty 30800 Sep 16 2020 /usr/bin/wall
654522 40 -rwxr-sr-x 1 root crontab 39352 May 10 2022 /usr/bin/crontab
654763 44 -rwxr-sr-x 1 root mlocate 43088 Mar 1 2018 /usr/bin/mlocate
654516 52 -rwsr-sr-x 1 daemon daemon 51464 Feb 20 2018 /usr/bin/at
11141 12 -rwxr-sr-x 1 root utmp 10232 Mar 11 2016 /usr/lib/x86_64-linux-gnu/utempter/utempter
134154 4 drwxrwsr-x 2 root staff 4096 Apr 24 2018 /var/local
134156 4 drwxrwsr-x 2 root mail 4096 Mar 24 2022 /var/mailProcesses
mark@seventeen:~$ ps -auxwww
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
mark 82743 0.3 0.1 77020 7956 ? Ss 06:11 0:07 /lib/systemd/systemd --user
mark 82832 0.0 0.1 21472 5148 pts/0 Ss 06:12 0:00 -bashPrivilege limitation
Cron & Systemd
mark@seventeen:~$ crontab -l ; cat /etc/crontab ; systemctl list-timers
no crontab for mark
# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.
SHELL=/bin/sh
path=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# m h dom mon dow user command
17 * * * * root cd / && run-parts --report /etc/cron.hourly
25 6 * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6 1 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
#
NEXT LEFT LAST PASSED UNIT ACTIVATES
tue 2023-06-20 07:09:00 UTC 14min left Tue 2023-06-20 06:39:09 UTC 15min ago phpsessionclean.timer phpsessionclean.servic
tue 2023-06-20 09:40:01 UTC 2h 45min left Tue 2023-06-20 03:12:55 UTC 3h 41min ago ua-timer.timer ua-timer.service
tue 2023-06-20 10:12:24 UTC 3h 18min left Tue 2023-06-20 02:19:46 UTC 4h 34min ago apt-daily.timer apt-daily.service
tue 2023-06-20 20:27:04 UTC 13h left Tue 2023-06-20 05:49:44 UTC 1h 4min ago motd-news.timer motd-news.service
wed 2023-06-21 02:34:36 UTC 19h left Tue 2023-06-20 02:34:36 UTC 4h 19min ago systemd-tmpfiles-clean.timer systemd-tmpfiles-clean
wed 2023-06-21 06:41:55 UTC 23h left Tue 2023-06-20 06:30:12 UTC 24min ago apt-daily-upgrade.timer apt-daily-upgrade.serv
mon 2023-06-26 00:00:00 UTC 5 days left Tue 2023-06-20 02:19:46 UTC 4h 34min ago fstrim.timer fstrim.service
7 timers listed.
Pass --all to see loaded but inactive timers, too.
lines 1-11/11 (END)Sudo Version
mark@seventeen:~$ sudo --version
Sudo version 1.8.21p2
Sudoers policy plugin version 1.8.21p2
Sudoers file grammar version 46
Sudoers I/O plugin version 1.8.21p2Sudo version 1.8.21p2
Glibc Version
mark@seventeen:~$ ldd --version
ldd (Ubuntu GLIBC 2.27-3ubuntu1.5) 2.27
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.ldd (Ubuntu GLIBC 2.27-3ubuntu1.5) 2.27