I use a mongodb database, I am on macOS, the command mongoexport does not pass, I am under the /bin directory of the database
here is my command
mongoexport --db Battleship --collection user --out resultExport.json
my database is Battleship , and the collection is user
any idea \?
If mongoexport is in the same directory that your current one (and also is executable and you got perms to execute it) then you need to prepend executable with ./ and invoke it that way:
./mongoexport --db Battleship --collection user --out resultExport.json
Here's more on why you need that for https://askubuntu.com/a/320657/649099
If there is a warning mongoexport command not found, you have to install
mongodb-org-tools
For centos users
yum install mongodb-org-tools
For Ubuntu:
Import the public key used by the package management system.
wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | sudo apt-key add -
Create a list file for MongoDB
Ubuntu 18.04:
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list
Ubuntu 20.04:
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list
Reload local package database.
sudo apt-get update
Install the MongoDB packages.
sudo apt-get install -y mongodb-org
Related
I am trying to get a dump of a specific collection from my database. In mac, I am running the following command:
/usr/local/bin/mongodump --uri <connection_string> --db admin --collection tenants and it works perfectly well.
However, when I try to run the same command in ubuntu, I get the following error:
error parsing command line options: illegal argument combination: cannot specify --db and --uri
I tried to add the /dbname suffix to the connection string but then I am not able to download a single collection as it fails with the error Failed: bad option: cannot dump a collection without a specified database
Replacing --uri with --host seems like another possible solution but that does not work for me since I only have the connection string and do not have access to the username and password.
Another weird thing I noticed is that in mac, the command mongodump --version returns:
MongoDB shell version v5.0.6
Build Info: {
"version": "5.0.6",
"gitVersion": "212a8dbb47f07427dae194a9c75baec1d81d9259",
"modules": [],
"allocator": "system",
"environment": {
"distarch": "x86_64",
"target_arch": "x86_64"
}
}
However, in ubuntu I am seeing mongodump version: built-without-version-string.
How do I get a dump of a single collection using connection string on Ubuntu?
Looks like the installation of mongo-tools was corrupt.
Fixed it by installing using these commands
wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | sudo apt-key add -
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list
sudo apt-get update
sudo apt-get install -y mongodb-org
I'm trying to follow a MongoDB example for learning matters.
The instructions say that after starting MongoDB I will have a mongodb terminal so I can create a database and make it the active one.
The problem is that I start mongodb but I don't have the application terminal, it runs but at the end I have the ubuntu's terminal.
I followed this https://docs.mongodb.com/manual/tutorial/install-mongodb-on-os-x/ to install Mongo:
pip install pymongo
wget -qO - https://www.mongodb.org/static/pgp/server-5.0.asc | sudo apt-key add -
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/5.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-5.0.list
sudo apt-get update
sudo apt-get install -y mongodb-org
I also installed COMPASS, this is running correctly
wget https://downloads.mongodb.com/compass/mongodb-compass_1.26.1_amd64.deb
sudo dpkg -i mongodb-compass_1.26.1_amd64.deb
mongodb-compass
I'm starting Mongo
sudo systemctl start mongod #this do something but takes me back to the terminal prompt.
mongosh #is launching this "MongoNetworkError: connect ECONNREFUSED 127.0.0.1:27017"
Definitely I'm doing something wrong but I cannot identify it.
Does anyone have an idea?
Thanks in advance
I has 128-dimensional vectors of float (face recognition issue). To store these vectors I use datatype cube in Postgresql.
This type has limit by default - 100 dim.
In the psql (PostgreSQL) 10.5 (Ubuntu 10.6-0ubuntu0.18.04.1) this limit don't work: I can store my vector without any problems.
But yeasterday one of my machine was updated to PostgreSQL 10.6 and now I receive an error when try to add new cube-vector into my database. Error about too long vector.
To resolve this problem I have to change this limit in the file cubedata.h which is in contrib directory. But I have no this file and such directory at all!
I try install
sudo apt-get install postgresql-contrib
but, I get the message about the newest postgresql-contrib version is already installed.
After I tried to manually download cubedata.h file into the directory of Postgresql (/usr/share/postgresql/10/extension/), but it doesn't help.
My be someone encountered with such problem?
In Ubuntu 18.04.1 cubedata.h included in the postgres-server-dev-10 package from the PostgreSQL official repository. But prebuilt cube.so included in the postgresql-10 package with default limit.
To increase the limit you should recompile cube.so from source. Below the example of code for the Ubuntu.
Add repository:
PG_VER=10.6
source /etc/os-release
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
echo "deb http://apt.postgresql.org/pub/repos/apt/ ${VERSION_CODENAME}-pgdg main" | sudo tee /etc/apt/sources.list.d/pgdg.list
sudo apt-get update
sudo apt-get install -y postgresql-${PG_VER%.*}
Compile cube extension from source:
PG_VER=10.6
sudo apt-get install -y unzip gcc make zlib1g-dev libreadline-dev postgresql-server-dev-${PG_VER%.*} bison flex
wget https://ftp.postgresql.org/pub/source/v${PG_VER}/postgresql-${PG_VER}.tar.bz2 --quiet -O postgresql.tar.bz2
tar xvf postgresql.tar.bz2
cd postgresql-${PG_VER}
./configure
cd contrib/cube
sed -i 's/#define CUBE_MAX_DIM (100)/#define CUBE_MAX_DIM (128)/' cubedata.h
make USE_PGXS=1
sudo make USE_PGXS=1 install
Check result after restart server:
sudo -u postgres psql dbname -c 'CREATE EXTENSION cube'
sudo -u postgres psql dbname -c 'SELECT cube_dim(cube(array(select generate_series(1, 128)))) as dim'
So I'm having this problem where for some reason I can't install any package on my ubuntu system.
I'm currently on Ubuntu 16.10.
terminal install logs
Update:
I've done entered those commands and got this.
after update and apt-cache
What should I do now?
sudo apt-get install wget ca-certificates
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ `lsb_release -cs`-pgdg main" >> /etc/apt/sources.list.d/pgdg.list'
sudo apt-get update
sudo apt-get install postgresql postgresql-contrib
After installing the PostgreSQL database server, by default, it creates a user ‘postgres’ with role ‘postgres’. Also creates a system account with the same name ‘postgres’. So to connect to Postgres server, log in to your system as user postgres and connect database.
sudo su - postgres
psql
First do
sudo apt-get update
You should get no errors upon updating. In case you do, then you might have issues with your firewall, or something blocking you from updating repositories. Check the output carefully.
And then search for the correct (exact!) package name using this command:
apt-cache search postgresql
As a last resort you could add external 3rd Party repository as described in this answer. Just remember to use your distribution name instead of "xenial".
It should work.
$ sudo apt-get install postgresql postgresql-client
If you are getting (E: Unable to locate package postgresql-12) while migrating following step may helps you:
sudo apt-get -y install bash-completion wget
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc |
sudo apt-key add -
sudo apt-get update
sudo apt-get -y install postgresql-12 postgresql-client-12
sudo systemctl status postgresql
ref:install postgres12 in ubuntu-18.04
Following Commands worked for me: sudo apt-get install wget ca-certificates
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ lsb_release -cs-pgdg main" >> /etc/apt/sources.list.d/pgdg.list'
sudo apt-get update
sudo apt install postgresql-11 libpq-dev
I am not able to start MongoDB in my Ubuntu machine. First I follow below steps to install MongoDB in my Ubuntu system.
1->sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
2-> echo "deb http://repo.mongodb.org/apt/ubuntu "$(lsb_release -sc)"/mongodb-org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list
3-> sudo apt-get update
4-> sudo apt-get install -y mongodb-org
5-> service mongod start
While I tried to start the MongoDB I got the following message rather than its starting.
status:unknown job : mongod
I am trying to also remove the mongodb.lock file from /var/lib/mongodb folder but unable to remove here I need to start the MongoDB service.
ok try this one:
sudo apt-get purge mongodb-stable
sudo apt-get install mongodb-stable
(remove the lock file if present in /var/lib/mongodb)
Then edit /etc/init/mongodb.conf removing the line "limit nofile 20000"