I'm trying to build a setup script to automate the development environments creation, but I'm having trouble both trying to pipe or using the -c modifier for psql.
I've tried:
sudo su postgres psql -c "ALTER ROLE postgres WITH password 'pass'"
and
sudo su postgres psql -c "ALTER ROLE postgres WITH password 'pass';"
Both of which say "ALTER: command not found"
I've also tried pipe, but I'm not able to combine it with su correctly
eg: I tried something like
sudo su postgres echo "ALTER ROLE postgres WITH password 'pass'" | psql
But postgres can't execute "echo"
And:
echo "ALTER ROLE postgres WITH password 'pass'" | sudo su psql
Which just doesn't work.
So, my first question is: how can I execute this simple command from a sh file?
And the second one, less related: how can I use different users in the commands chained with pipe?
What's wrong is the lack of -c or --command for su to indicate that the rest of the line is a command.
But su is not needed anyway, because there's already sudo. Do this instead:
sudo -u postgres psql -c "ALTER ROLE postgres WITH password 'pass'"
If you are just like me, make sure you are not running this from:
bash-4.2$
but:
postgres=#
Related
I have developed a shell script whose job is to take the dump of postgres DB. Below is the snippet:
#!/bin/sh
today=$(date +"%Y-%m-%d")
yes "password" | sudo -S sudo su - postgres <<EOF
/usr/pgsql-11/bin/pg_dump -U postgres -d db_name > /home/db_backup/db_name_$today.sql
EOF
exit
However, this script is NOT running because of the below reason:
[sudo] password for user: Sorry, Try again
However, when I use sudo su - postgres and then provide password, it is working as expected. And interestingly, if now I run the above shell script after the login, it runs absolutely fine.
What I am missing here.
It is dangerous to store passwords in scripts, so please do not do it.
Modify your /etc/sudoers file by running sudo visudo and adding a line like this at the bottom:
%sudo ALL=(postgres) NOPASSWD: /usr/bin/psql
This allows anyone with sudo permission to run /usr/bin/psql to postgres on any host (ALL) with no password.
Now your script should work this way:
#!/bin/sh
today=$(date +"%Y-%m-%d")
sudo -b -n -H -u postgres /usr/pgsql-11/bin/pg_dump -U postgres -d db_name > /home/db_backup/db_name_$today.sql
Make sure postgres can write to the directory /home/db_backup/.
I am able to run psql by doing the following:
Davids-d david$ psql --u postgres
Password for user postgres:
psql (9.4.18)
Type "help" for help.
postgres=#
However, when I run the following command, I get an error:
Davids-iMac:datadocs david$ sudo -u postgres psql -f resources/postgresql/initdb.sql
could not identify current directory: Permission denied
What does this mean, and how would I resolve this? Note that I do have the following var set:
david$ echo $PGDATA
/Users/david/PostgreSQL/data/pg94
The issue is the sudo -u postgres.
Your shell is running as you, but you're running the command as the postgres user. It does not have permission to see the file or even be in the current directory.
We can eliminate psql from the equation by just trying to read the file as the postgres user with sudo -u postgres cat resources/postgresql/initdb.sql. You should get the same error.
There's two things you have to do...
cd to a directory that the postgres user can be in.
Put the file in a place the postgres user can access.
/tmp, for example.
Your command seems wrong, try this:
sudo psql -U postgres -f resources/postgresql/initdb.sql
I am having troubles getting started with psql. I can login using the script below
myusername#ubuntu:~/Desktop/dbscripts$ sudo su - postgres
postgres#ubuntu:~$
But, once here, I cannot figure out how to find my .sql file.
I tried the options supplied by Bolo here:
How to import existing *.sql files in PostgreSQL 8.4?
But they only give
myusername#ubuntu:~/Desktop/dbscripts$ psql -U root -d first -f myscript.sql
psql: FATAL: Peer authentication failed for user "root"
and
myusername#ubuntu:~/Desktop/dbscripts$ psql -f myscript.sqlp
sql: FATAL: role "myusername" does not exist
and
myusername#ubuntu:~/Desktop/dbscripts$ sudo su - postgres
postgres#ubuntu:~$ \i myscript.sql
The program 'i' is currently not installed. To run 'i' please ask your administrator to install the package 'iprint'
This can be handled from any of the above options you tried. In which path do you have myscript.sql? After you do su - postgres, give the full path . So it will be psql -d first -f <pathtosqlfile>/myscript.sql. psql -U root will not work unless you have a user root in the database. Try psql -U postgres. You can do \i sqlscript at psql prompt, not at linux command prompt as you have done. The error you are getting "role "myusername" does not exist" can be avoided either by using -U postgres (or any other db user) or by setting the PGUSER environment variable.
First I run the command:
sudo su _postgres
Then I run the command:
create role mixeddrinks with createdb login password 'password1'
But it comes back with:
-bash: create: command not found
I’m not very familiar with the Terminal and with PostgreSQL so I’m not sure what I am doing wrong I am trying to create a role and a database.
First I run the command sudo su _postgres, then I run the command create role mixeddrinks with createdb login password 'password1'
You're mixing up shell commands and the psql command line.
If you want to use SQL, you need to use the psql command. sudo su _postgres is an inefficient way of getting a unix command shell as the _postgres user. It doesn't give you an SQL shell. You can run unix commands like psql, createuser, etc from the unix command shell. You can tell you're at the command shell because the prompt looks something like:
postgres$
If you want an SQL shell, so you can run commands like CREATE USER, etc, you need to run psql. If you want a superuser SQL shell, that'd be something like:
sudo -u _postgres psql
This will give you a prompt like:
postgres=#
where you can run SQL commands. Remember that SQL commands end with a semicolon.
postgres=# create role mixeddrinks with createdb login password 'password1';
I am using Ubuntu 12.04 and Postgress 9.2.
I need to create this user with this password e.g.
postgres://admin:test101#127.0.0.1:5432
How to do that from the command line? I need to automate with a bash script. I have a fresh install.
This will create user admin with password test101 on localhost:
psql -c "CREATE USER admin WITH PASSWORD 'test101';"
To run it from any user just add the sudo -u postgres to it:
sudo -u postgres bash -c "psql -c \"CREATE USER vagrant WITH PASSWORD 'vagrant';\""
To run it on the original docker image for example you can use the su -c command with the postgres user in combination with psql:
su -c "psql -c \"CREATE ROLE my_user WITH LOGIN PASSWORD 'my_password' \"" postgres