Mar 21 02:40:27 raspberrypi sshd[5204]: pam_unix(sshd:session): session opened for user pi by (uid=0)
Mar 21 02:40:28 raspberrypi systemd-logind[255]: New session c11 of user pi.

==> /var/log/syslog <==
Mar 21 02:40:28 raspberrypi systemd[1]: Started Session c11 of user pi.

==> /var/log/auth.log <==
Mar 21 02:40:45 raspberrypi sshd[5216]: error: ioctl(TIOCSCTTY): Input/output error
Mar 21 02:40:45 raspberrypi sshd[5216]: error: /dev/pts/2: No such file or directory
Mar 21 02:40:45 raspberrypi sshd[5216]: error: open /dev/tty failed - could not set controlling tty: No such device or address
Mar 21 02:40:45 raspberrypi sudo:       pi : TTY=unknown ; PWD=/home/pi ; USER=root ; COMMAND=/bin/sh -c echo BECOME-SUCCESS-hiotxsciuovvdrehwiaimpozzlhavtkd; bash -c "test -e /usr/bin/python || ( ( test -e /usr/bin/apt && apt -qqy update && apt install -qqy python-minimal) || ( test -e /usr/bin/dnf && /usr/bin/dnf -qy install python) || ( test -e /usr/bin/yum && /usr/bin/yum -qy install python) )"
Mar 21 02:40:45 raspberrypi sudo: pam_unix(sudo:session): session opened for user root by (uid=0)
Mar 21 02:40:45 raspberrypi sudo: pam_unix(sudo:session): session closed for user root



root@raspberrypi:~# ls -la /dev/pts
total 0
drwxr-xr-x  2 root root      0 Nov  3  2016 .
drwxr-xr-x 16 root root   3480 Mar 20 18:22 ..
crw-------  1 pi   tty  136, 0 Mar 21 02:48 0
crw-------  1 pi   tty  136, 1 Mar 21 02:48 1
c---------  1 root root   5, 2 Nov  3  2016 ptmx
root@raspberrypi:~# cat /proc/mounts | grep pt
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0