Connection server in SQL Server 2014 invalid path

I'm trying to use vfpoledb to create a linked server for FoxPro tables, but the error "Invalid path or filename" is displayed when I try to specify " xxx.xxx.x.x same_names abc" as the source.

( xxx.xxx.x.x stands for the IP address of the server)

However, I have no problem trying to use the parent folder: xxx.xxx.x.x same_names.

The only thing that comes to my mind is that the length of the path can be limited. Are there really any restrictions or am I doing something wrong?

postgresql – what does this connection error message mean?

$ psql -h host db_name

psql: New process for connection could not be split: memory can not be allocated

I think I have enough free memory?

Other conditions when using jdbc:

Caused by: java.lang.IllegalStateException: Received resultset tuples, but no field structure for them
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2086)
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:288)
    at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:430)
    at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:356)
    at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:168)
    at org.postgresql.jdbc.PgPreparedStatement.executeQuery(PgPreparedStatement.java:116)

org.postgresql.util.PSQLException: A connection could not be made using the requested protocol null.
        at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:59)
        at org.postgresql.jdbc.PgConnection.(PgConnection.java:216)
        at org.postgresql.Driver.makeConnection(Driver.java:404)
        at org.postgresql.Driver.connect(Driver.java:272)
        at java.sql.DriverManager.getConnection(DriverManager.java:664)
        at java.sql.DriverManager.getConnection(DriverManager.java:247)

  Detail: Failed on request of size 81160 in memory context "MessageContext".
java.lang.RuntimeException: org.postgresql.util.PSQLException: ERROR: out of memory
  Detail: Failed on request of size 81160 in memory context "MessageContext".

Network – Create a WiFi access point that shares the Ethernet connection

I'm using Ubuntu Server 18.04 on a Raspberry Pi 3. The idea of ​​what I want to achieve is illustrated by the following scheme:

                             Raspberry Pi
             WiFi        ┌──────bridge──────┐     Ethernet
   Laptop <~.~.~.~.~.~.~>│ (wlan0)br0(eth0) │<---------------->Device
                                    /                           /
   192.168.1.200             192.168.1.1               192.168.1.10

Basically, the sensors collect data on the device and the Raspberry runs a MERN app that displays them and can be accessed by anyone connected to the WiFi access point.

I've accomplished this configuration in the Raspbian operating system after this post, but I need to do something equivalent on Ubuntu Server 18.04 because I need the latest version of MongoDB for the device to store the data.

wifi-ap (Details here) works efficiently to create the access point, but the Ethernet connection to the device is not bridged. I tried to give and static IP in the netplan and confuse with that dhcp but it still did not work.

Is there a way to make the bridge with that? wifi-ap? What do I miss?
Or is there a way to replicate this in Ubuntu Server 18.04? Or another way to make it work?

Thank you in advance.

Set up workstations with direct video connection in Windows Server 2016 running multipoint services

I'm new to server management and have set up a workstation server for my school staff, where a group of teachers can do their work from a primary or a single PC. I think Windows Server 2016 with multipoint services is the best option to choose from. I have set up the MPS with the primary monitor and WMSSHELL as the administrator. Do I still need something to set up? Will all monitors (I expect 3 for each PC) work as soon as I connect them to the server with their individual mouse and keyboard? I have created accounts for each teacher on the primary workstation. If the monitors are not plug-and-play capable, can I do anything else? Any help is greatly appreciated.

postgresql – Calling PQconnectdbParams to connect to postgres reports a connection timeout error

What are the acceptable formats for sending connection string to PQconnectdbParams method to connect to postgres db?

I try to follow one, but it does not work and always displays timeout errors. I'm not sure what I did is wrong.

host=xxx.xxx.us-west-2.rds.amazonaws.com port=5432 dbname=dbname password=my_password user=user_name

The error message is as follows

ERROR: Unable to connect to postgresql server: timeout expired

If required, I can provide more details.

Note: I can connect to the DB psql Command from terminal but can not when I use PQconnectdbParams with the same credentials.

Network – How to monitor and log my internet connection in Mojave

I have to run a program remotely and connect my iMac (Mojave) to the internet for hours. When I leave my iMac, my program does not seem to be running anymore. I suspect that this is due to a problem with the internet connection. I have my iMac so that it never goes to sleep when my display is in sleep mode.

could monitor and log my internet connection. Is there a log file on the Mac that shows when my Internet connection was interrupted?

Any help would be appreciated.

CS

Bitcoin Core – difference between inbound and outbound connection

I use a Bitcoin full node (Bitcoin kernel) over Tor.
I noticed that I only have outgoing connections (with maxconnections = 16 in the conf file), but not even an incoming one.
So what exactly is the difference between inbound and outbound?
However, I can regularly receive update tips and forward my transactions to the network.
In addition, I set the option onlynet = onion, so that I only receive onion addresses and pass on onion addresses

SSH tunnel – The SSH connection between two specific locations is constantly interrupted

I have a number of remote systems, all connected by a series of tunnels and routed ports. This is made possible by AutoSSH. However, a particular system hosted in Data Center 1 briefly loses connectivity to a system in Data Center 2. Both systems have connections to other systems in other data centers that do not fail, and both can communicate with each other during SSH failure. that it is SSH.

The tunnel is structured as follows:

autossh -N -M 0 -o "ServerAliveInterval 30" -o "ServerAliveCountMax 3" -R 8080:localhost:8100 @ -i /home//key.pem

A non-verbose log of a failure looks like this:

Nov 05 02:19:03  autossh(22816): Connection to  closed by remote host.
Nov 05 02:19:03  autossh(22816): ssh exited with error status 255; restarting ssh
Nov 05 02:19:03  autossh(22816): starting ssh (count 5021)
Nov 05 02:19:03  autossh(22816): ssh child pid is 12314
Nov 05 02:19:33  autossh(22816): Connection to  closed by remote host.
Nov 05 02:19:33  autossh(22816): ssh exited with error status 255; restarting ssh
Nov 05 02:19:33  autossh(22816): starting ssh (count 5022)
Nov 05 02:19:33  autossh(22816): ssh child pid is 14159

A more detailed log (-v) of a failure can be found here: https://pastebin.com/H5XXPuRu

I would have assumed that this is a configuration option for the SSH of the destination server. However, since another system maintains an SSH connection to this target system during the outage, this does not seem to be the case.

Thanks in advance for any help you can afford!

Connection to the server in the local network via new OpenVPN not possible

I created an OpenVPN server on the AMI marketplace under AWS and changed the VPN settings for the network address and group default IP 10.0.0.0/20

I then downloaded the client file and added it via the import option to my Ubuntu 18.04 vpn settings.

After that I tried to ssh into another server 10.0.10.220 This failed, although port 22 is wide open (0.0.0.0/0)

When I check ifconfig for details about the connection, I'll see below what's related to the VPN.

tun0: flags=4305  mtu 1500
        inet 10.0.8.2  netmask 255.255.252.0  destination 10.0.8.2
        inet6 fe80::eac9:76b7:5e88:68e4  prefixlen 64  scopeid 0x20
        unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 100  (UNSPEC)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 141  bytes 7544 (7.5 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

A note, my local home network is 192.168.X.X so there should be no conflicts