Cannot find my_cli_shell_api

hi,one day,i wake up and ssh to vyos,and configure it with bash,it occur error: no such file or directory.
i find my_cli_shell_api, and it disapper

Update your system to the latest rolling.

vyos@r4-roll:~$ sudo ls -la /opt/vyatta/sbin/ | grep shell
-rwxr-xr-x 1 root root  60440 Aug 26  2018 my_cli_shell_api
vyos@r4-roll:~$

it happen by accident, i want to know why
It has been running steadily on VMware, I am very surprised at the mistake

I found an exception


normal

i forget a important message, i tried to used chrony instead of ntp, but i failed

and when i execute apt-get remove apt:

root@vyos:/home# apt-get remove ntp
Reading package lists… Done
Building dependency tree
Reading state information… Done
The following packages were automatically installed and are no longer required:
libedit2 apt-transport-https libpcsclite1 openssh-server dnsmasq-base libradiusclient-ng2 libnet-ssleay-perl xsltproc
tasksel-data libnl-3-200 traceroute laptop-detect iftop libwrap0 lsof wireless-regdb unionfs-fuse libheartbeat2 libxml2-utils
libparted0debian1 libdbus-1-3 libopts25 at ed libxslt1.1 radvd iw libterm-readkey-perl wireshark-common libnspr4-0d
libcpufreq0 python-central whois libtimedate-perl openvpn-blacklist libbsd0 parted ddclient libfam0 libfile-slurp-perl tcpdump
cluster-agents libterm-readline-perl-perl cluster-glue lighttpd hostapd bmon libpam-radius-auth libnl-genl-3-200
libpkcs11-helper1 cpufrequtils iputils-arping openssh-client libsmi2ldbl crda libtree-simple-perl vlan installation-report
curl libwant-perl liblzo2-2 libopenhpi2 ppp openssl-blacklist lsscsi wpasupplicant ssh libopenipmi0 libcluster-glue tasksel
pppoe libio-prompt-perl dnsmasq libdaemon0 libsocket6-perl bcrelay heartbeat libnl2 pptpd liblua5.1-0 squidclient dialog
xl2tpd libsysfs2 iputils-ping rsyslog libnetaddr-ip-perl libcurl3-gnutls openvpn fuse-utils bridge-utils mdadm
libio-socket-ssl-perl tshark libnet1 libcorosync4 libnss3-1d dmidecode mgetty openssh-blacklist
Use ‘apt-get autoremove’ to remove them.
The following packages will be REMOVED:
ntp vyatta-cfg vyatta-cfg-dhcp-relay vyatta-cfg-dhcp-server vyatta-cfg-firewall vyatta-cfg-op-pppoe vyatta-cfg-qos
vyatta-cfg-quagga vyatta-cfg-system vyatta-cfg-vpn vyatta-cluster vyatta-config-mgmt vyatta-conntrack vyatta-cron
vyatta-eventwatch vyatta-ipv6-rtradv vyatta-nat vyatta-netflow vyatta-op vyatta-op-dhcp-server vyatta-op-firewall
vyatta-op-qos vyatta-op-quagga vyatta-op-vpn vyatta-openvpn vyatta-ravpn vyatta-version vyatta-vrrp vyatta-wanloadbalance
vyatta-webgui vyatta-webproxy vyatta-wireless vyatta-wirelessmodem vyatta-zone vyos-nhrp
0 upgraded, 0 newly installed, 35 to remove and 0 not upgraded.
After this operation, 68.1 MB disk space will be freed.
Do you want to continue [Y/n]? y
(Reading database … 38736 files and directories currently installed.)
Removing vyatta-version …
dpkg: warning: while removing vyatta-version, directory ‘/opt/vyatta/etc/config’ not empty so not removed.
Removing vyatta-cfg-dhcp-server …
Removing vyatta-config-mgmt …
Removing vyatta-cfg-quagga …
Removing vyatta-cluster …
Removing vyatta-wanloadbalance …
Removing vyatta-op-qos …
Removing vyatta-openvpn …
Removing vyatta-nat …
Removing vyatta-wireless …
Removing vyatta-op-quagga …
Removing vyatta-webproxy …
Removing vyatta-ravpn …
Removing vyatta-op-vpn …
Removing vyatta-cfg-vpn …
Removing vyatta-cfg-qos …
Removing vyatta-zone …
Removing vyatta-cfg-dhcp-relay …
Removing vyatta-ipv6-rtradv …
Removing vyatta-netflow …
Removing vyos-nhrp …
Removing vyatta-op-firewall …
Removing vyatta-wirelessmodem …
Removing vyatta-cfg-op-pppoe …
Removing vyatta-cron …
Removing vyatta-vrrp …
Removing vyatta-eventwatch …
Removing vyatta-webgui …
Removing vyatta-conntrack …
Removing vyatta-cfg-firewall …
Removing vyatta-op-dhcp-server …
Removing vyatta-op …
Removing vyatta-cfg-system …
Removing vyatta-cfg …
Removing ntp …
Stopping NTP server: ntpd.
Processing triggers for man-db …

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