Error message regarding PATH with zabbix-agent2 on Linux

[earendil]

Hello,

I have an error currently with the last version of Zabbix-Agent2 on Linux server.
The "system.run" and "system.users.num" key seems not working with the following error message:

# zabbix_get -s localhost -k system.users.num
ZBX_NOTSUPPORTED: Failed to get logged in user count: Cannot execute command: exec: "sh": executable file not found in $PATH.

But, when I check on the Zabbix Agent configuration, I see nothing that can explain this issue...

• Systemd service file:

# systemctl cat zabbix-agent2
# /usr/lib/systemd/system/zabbix-agent2.service
[Unit]
Description=Zabbix Agent 2
After=syslog.target
After=network.target

[Service]
Environment="CONFFILE=/etc/zabbix/zabbix_agent2.conf"
EnvironmentFile=-/etc/sysconfig/zabbix-agent2
Type=simple
Restart=on-failure
PIDFile=/run/zabbix/zabbix_agent2.pid
KillMode=control-group
ExecStart=/usr/sbin/zabbix_agent2 -c $CONFFILE
ExecStop=/bin/kill -SIGTERM $MAINPID
RestartSec=10s
User=zabbix
Group=zabbix

[Install]
WantedBy=multi-user.target

# /etc/systemd/system/zabbix-agent2.service.d/override.conf
[Service]
LimitNOFILE=97816

• Configuration file (/etc/zabbix/zabbix_agent2.conf):

# grep '^[^#]' /etc/zabbix/zabbix_agent2.conf
PidFile=/var/run/zabbix/zabbix_agent2.pid
LogType=system
LogFile=/var/log/zabbix/zabbix_agent2.log
LogFileSize=100
DebugLevel=3
Server=localhost,10.23.241.219,10.12.100.220
ListenPort=10050
StatusPort=9999
ServerActive=10.23.241.219,10.12.100.220
Hostname=euhmonp20
HostMetadataItem=system.uname
AllowKey=system.run[*]
RefreshActiveChecks=120
BufferSend=5
BufferSize=100
PersistentBufferPeriod=1h
Timeout=3
Include=/etc/zabbix/zabbix_agent2.d
UnsafeUserParameters=0
ControlSocket=/tmp/agent.sock

Did someone has already seen this error? And have perhaps the solution to fixe it?

Thanks.

[cyber]

I think Zabbix is using plain "sh" to execute commands. Your error message indicates, it cannot find it. Usually it is a link to bash somewhere.
"which sh" or "whereis sh" should show you, if it is present and in path... If you can do it as user zabbix. then you should see, if it is found or not.