System/Kernel


www-data@haircut:~/html$ file /bin/bash ; uname -a ; cat /etc/*release
/bin/bash: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=0428e4834e687e231fa865562d32fbb64ce45577, stripped
linux haircut 4.4.0-78-generic #99-ubuntu smp thu apr 27 15:29:09 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.2 LTS"
NAME="Ubuntu"
VERSION="16.04.2 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.2 LTS"
VERSION_ID="16.04"
home_url="http://www.ubuntu.com/"
support_url="http://help.ubuntu.com/"
bug_report_url="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial

4.4.0-78-generic Ubuntu 16.04.2 LTS (Xenial Xerus) x86_64

Networks


www-data@haircut:~/html$ netstat -antup4
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      -               
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      1218/nginx: worker 
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -               
tcp        0      0 10.10.10.24:50380       10.10.14.5:9998         ESTABLISHED 3916/sh         
tcp        0    297 10.10.10.24:48388       10.10.14.5:9999         ESTABLISHED 3914/sh         
udp        0      0 10.10.10.24:42884       8.8.8.8:53              ESTABLISHED -               

127.0.0.1:3306

Users & Groups


www-data@haircut:~/html$ 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-timesync:x:100:102:systemd Time Synchronization,,,:/run/systemd:/bin/false
systemd-network:x:101:103:systemd Network Management,,,:/run/systemd/netif:/bin/false
systemd-resolve:x:102:104:systemd Resolver,,,:/run/systemd/resolve:/bin/false
systemd-bus-proxy:x:103:105:systemd Bus Proxy,,,:/run/systemd:/bin/false
syslog:x:104:108::/home/syslog:/bin/false
_apt:x:105:65534::/nonexistent:/bin/false
lxd:x:106:65534::/var/lib/lxd/:/bin/false
messagebus:x:107:111::/var/run/dbus:/bin/false
uuidd:x:108:112::/run/uuidd:/bin/false
dnsmasq:x:109:65534:dnsmasq,,,:/var/lib/misc:/bin/false
maria:x:1000:1000:maria,,,:/home/maria:/bin/bash
mysql:x:110:117:MySQL Server,,,:/nonexistent:/bin/false
lightdm:x:111:118:Light Display Manager:/var/lib/lightdm:/bin/false
pulse:x:112:121:PulseAudio daemon,,,:/var/run/pulse:/bin/false
sshd:x:113:65534::/var/run/sshd:/usr/sbin/nologin
total 12K
4.0K drwxr-xr-x 15 maria maria 4.0K Jul 13  2021 maria
4.0K drwxr-xr-x  3 root  root  4.0K Jul 13  2021 .
4.0K drwxr-xr-x 23 root  root  4.0K Jul 13  2021 ..

maria

SUIDs


www-data@haircut:~/html$ find / -perm -04000 -ls -type f 2>/dev/null
    53377    140 -rwsr-xr-x   1 root     root       142032 Jan 28  2017 /bin/ntfs-3g
    52805     44 -rwsr-xr-x   1 root     root        44680 May  7  2014 /bin/ping6
    53367     32 -rwsr-xr-x   1 root     root        30800 Jul 12  2016 /bin/fusermount
    52955     40 -rwsr-xr-x   1 root     root        40128 May  4  2017 /bin/su
    52791     40 -rwsr-xr-x   1 root     root        40152 Dec 16  2016 /bin/mount
    52804     44 -rwsr-xr-x   1 root     root        44168 May  7  2014 /bin/ping
    52839     28 -rwsr-xr-x   1 root     root        27608 Dec 16  2016 /bin/umount
   262400    136 -rwsr-xr-x   1 root     root       136808 Jan 20  2017 /usr/bin/sudo
   273351     24 -rwsr-xr-x   1 root     root        23376 Jan 18  2016 /usr/bin/pkexec
   266457     36 -rwsr-xr-x   1 root     root        32944 May  4  2017 /usr/bin/newuidmap
   266260     40 -rwsr-xr-x   1 root     root        39904 May  4  2017 /usr/bin/newgrp
   266765     36 -rwsr-xr-x   1 root     root        32944 May  4  2017 /usr/bin/newgidmap
   267324     76 -rwsr-xr-x   1 root     root        75304 May  4  2017 /usr/bin/gpasswd
   273121     52 -rwsr-sr-x   1 daemon   daemon      51464 Jan 14  2016 /usr/bin/at
   267325     56 -rwsr-xr-x   1 root     root        54256 May  4  2017 /usr/bin/passwd
   268146   1552 -rwsr-xr-x   1 root     root      1588648 May 19  2017 /usr/bin/screen-4.5.0
   267327     40 -rwsr-xr-x   1 root     root        40432 May  4  2017 /usr/bin/chsh
   267323     52 -rwsr-xr-x   1 root     root        49584 May  4  2017 /usr/bin/chfn
   265697     40 -rwsr-xr-x   1 root     root        38984 Mar  7  2017 /usr/lib/x86_64-linux-gnu/lxc/lxc-user-nic
   272188     44 -rwsr-xr--   1 root     messagebus    42992 Jan 12  2017 /usr/lib/dbus-1.0/dbus-daemon-launch-helper
    28123    204 -rwsr-xr-x   1 root     root         208680 Apr 29  2017 /usr/lib/snapd/snap-confine
   265195     12 -rwsr-xr-x   1 root     root          10232 Mar 27  2017 /usr/lib/eject/dmcrypt-get-device
   267345    420 -rwsr-xr-x   1 root     root         428240 Mar 16  2017 /usr/lib/openssh/ssh-keysign
    26270     16 -rwsr-xr-x   1 root     root          14864 Jan 18  2016 /usr/lib/policykit-1/polkit-agent-helper-1

/bin/ntfs-3g /usr/bin/pkexec /usr/bin/screen-4.5.0

SGIDs


www-data@haircut:~/html$ find / -perm -02000 -ls -type f 2>/dev/null
    52967     36 -rwxr-sr-x   1 root     shadow      35600 Mar 16  2016 /sbin/unix_chkpwd
    52931     36 -rwxr-sr-x   1 root     shadow      35632 Mar 16  2016 /sbin/pam_extrausers_chkpwd
     1004      4 drwxrwsr-x   2 root     staff        4096 Apr 12  2016 /var/local
     1020      4 drwxrwsr-x   2 root     mail         4096 Feb 15  2017 /var/mail
   272882     40 -rwxr-sr-x   1 root     mlocate     39520 Nov 18  2014 /usr/bin/mlocate
   267326     64 -rwxr-sr-x   1 root     shadow      62336 May  4  2017 /usr/bin/chage
   273159    428 -rwxr-sr-x   1 root     utmp       434216 Feb  7  2016 /usr/bin/screen.old
   262189     36 -rwxr-sr-x   1 root     crontab     36080 Apr  5  2016 /usr/bin/crontab
   272355     16 -rwxr-sr-x   1 root     tty         14752 Mar  1  2016 /usr/bin/bsd-write
   267322     24 -rwxr-sr-x   1 root     shadow      22768 May  4  2017 /usr/bin/expiry
   267356    352 -rwxr-sr-x   1 root     ssh        358624 Mar 16  2017 /usr/bin/ssh-agent
   262453     28 -rwxr-sr-x   1 root     tty         27368 Dec 16  2016 /usr/bin/wall
   273155     12 -rwxr-sr-x   1 root     utmp        10232 Mar 11  2016 /usr/lib/x86_64-linux-gnu/utempter/utempter
   265152      4 drwxrwsr-x   3 root     staff        4096 May 15  2017 /usr/local/lib/python3.5
   265153      4 drwxrwsr-x   2 root     staff        4096 Feb 15  2017 /usr/local/lib/python3.5/dist-packages
    28238      4 drwxrwsr-x   2 root     staff        4096 Jul 13  2021 /usr/local/share/fonts
   273610      4 drwxrwsr-x   6 root     staff        4096 May 15  2017 /usr/local/share/xml
   273611      4 drwxrwsr-x   2 root     staff        4096 May 15  2017 /usr/local/share/xml/misc
   273612      4 drwxrwsr-x   2 root     staff        4096 May 15  2017 /usr/local/share/xml/declaration
   273614      4 drwxrwsr-x   2 root     staff        4096 May 15  2017 /usr/local/share/xml/schema
   273613      4 drwxrwsr-x   2 root     staff        4096 May 15  2017 /usr/local/share/xml/entities
   273541      4 drwxrwsr-x   7 root     staff        4096 May 15  2017 /usr/local/share/sgml
   273546      4 drwxrwsr-x   2 root     staff        4096 May 15  2017 /usr/local/share/sgml/dtd
   273545      4 drwxrwsr-x   2 root     staff        4096 May 15  2017 /usr/local/share/sgml/misc
   273542      4 drwxrwsr-x   2 root     staff        4096 May 15  2017 /usr/local/share/sgml/declaration
   273543      4 drwxrwsr-x   2 root     staff        4096 May 15  2017 /usr/local/share/sgml/stylesheet
   273544      4 drwxrwsr-x   2 root     staff        4096 May 15  2017 /usr/local/share/sgml/entities
      295      0 drwxr-sr-x   3 root     systemd-journal       60 feb  3 12:22 /run/log/journal
      296      0 drwxr-s---   2 root     systemd-journal       80 feb  3 12:22 /run/log/journal/949f1809ad2507e1ab99350e591993eb

Processes


www-data@haircut:~/html$ ps -auxwww 
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.2  0.2  37952  6004 ?        Ss   12:21   0:02 /sbin/init
root       464  0.0  0.1  29648  2864 ?        Ss   12:22   0:00 /lib/systemd/systemd-journald
root       490  0.0  0.0  94772  1704 ?        Ss   12:22   0:00 /sbin/lvmetad -f
root       515  0.0  0.1  44360  3932 ?        Ss   12:22   0:00 /lib/systemd/systemd-udevd
systemd+   591  0.0  0.1 100324  2584 ?        Ssl  12:22   0:00 /lib/systemd/systemd-timesyncd
root      1001  0.0  0.0   5224   156 ?        Ss   12:22   0:00 /sbin/iscsid
root      1002  0.0  0.1   5724  3516 ?        S<Ls 12:22   0:00 /sbin/iscsid
root      1018  0.0  0.2  65520  5368 ?        Ss   12:22   0:00 /usr/sbin/sshd -D
message+  1019  0.0  0.1  42960  4040 ?        Ss   12:22   0:00 /usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation
root      1025  0.0  0.3 275768  6212 ?        Ssl  12:22   0:00 /usr/lib/accountsservice/accounts-daemon
root      1027  0.0  0.0  20100  1180 ?        Ss   12:22   0:00 /lib/systemd/systemd-logind
root      1029  0.0  1.1 201612 22940 ?        Ssl  12:22   0:00 /usr/lib/snapd/snapd
root      1042  0.1  0.5 192244 10336 ?        Ssl  12:22   0:00 /usr/bin/vmtoolsd
root      1053  0.0  0.1  29008  2880 ?        Ss   12:22   0:00 /usr/sbin/cron -f
syslog    1071  0.0  0.1 256396  3328 ?        Ssl  12:22   0:00 /usr/sbin/rsyslogd -n
root      1093  0.0  0.0   4400  1276 ?        Ss   12:22   0:00 /usr/sbin/acpid
daemon    1095  0.0  0.1  26044  2344 ?        Ss   12:22   0:00 /usr/sbin/atd -f
root      1096  0.5  0.3 637300  7072 ?        Ssl  12:22   0:04 /usr/bin/lxcfs /var/lib/lxcfs/
root      1103  0.0  0.1  15744  2516 ?        Ss   12:22   0:00 /usr/sbin/anacron -dsq
mysql     1144  0.0  7.5 1115840 154400 ?      Ssl  12:22   0:00 /usr/sbin/mysqld
root      1175  0.0  0.4 277180  8240 ?        Ssl  12:22   0:00 /usr/lib/policykit-1/polkitd --no-debug
root      1192  0.0  0.0  13376   164 ?        Ss   12:22   0:00 /sbin/mdadm --monitor --pid-file /run/mdadm/monitor.pid --daemonise --scan --syslog
root      1195  0.0  0.0  15940  1800 tty1     Ss+  12:22   0:00 /sbin/agetty --noclear tty1 linux
root      1217  0.0  0.0 125112  1460 ?        Ss   12:22   0:00 nginx: master process /usr/sbin/nginx -g daemon on; master_process on;
root      1220  0.0  1.2 221516 25384 ?        Ss   12:22   0:00 php-fpm: master process (/etc/php/7.0/fpm/php-fpm.conf)
www-data 22878  0.0  0.1  34424  2896 pts/0    R+   12:35   0:00 ps -auxwww

/usr/sbin/cron -f /usr/lib/policykit-1/polkitd --no-debug

Cron & Systemd


www-data@haircut:~/html$ crontab -l ; cat /etc/crontab ; systemctl list-timers
no crontab for www-data
# /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  
fri 2023-02-03 12:36:51 CET  4s left       n/a                          n/a     
fri 2023-02-03 18:01:36 CET  5h 24min left Fri 2023-02-03 12:22:05 CET  14min ag
fri 2023-02-03 18:41:36 CET  6h left       Fri 2023-02-03 12:22:05 CET  14min ag
 
3 timers listed.
Pass --all to see loaded but inactive timers, too.

Sudo Version


www-data@haircut:~/html$ sudo -V
Sudo version 1.8.16
Sudoers policy plugin version 1.8.16
Sudoers file grammar version 45
Sudoers I/O plugin version 1.8.16

Sudo version 1.8.16

Glibc Version


www-data@haircut:~/html$ ldd --version
ldd (Ubuntu GLIBC 2.23-0ubuntu7) 2.23
Copyright (C) 2016 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 2.23-0ubuntu7) 2.23