Rails Installation guide and quick fix tips

Start redis server => redis-server redis console => redis-cli view available databases => config get databases pubsub channels global* pubsub channels global_notification_2 pubsub channels global_notification pubsub channels * => Lists all the available channels pubsub numsub global_notification_2 => returns the number of subscribers From unix command line directly redis-cli PUBSUB CHANNELS redis-cli PUBSUB NUMSUB global_notification_2 [root@api prod-openmednet-api]# redis-cli PUBSUB CHANNELS 1) "_action_cable_internal" 2) "global_notification_2" [root@api prod-openmednet-api]# redis-cli PUBSUB CHANNELS global_notification_2 1) "global_notification_2" [root@api prod-openmednet-api]# redis-cli PUBSUB NUMSUB global_notification_2 1) "global_notification_2" 2) (integer) 2 NGINX configuration:  worker_processes   auto; worker_rlimit_nofile 500000;  #=> refer RLIM...

vi command description 0 move to beginning of the current line $ move to end of line H move to the top of the current window (high) M move to the middle of the current window (middle) L move to the bottom line of the current window (low) 1G move to the first line of the file 20G move to the 20th line of the file G move to the last line of the file

Export sql data to file copy (select * from table-name) to '/tmp/cta.pl.list' in root dnf install postgresql-server postgresql-devel service postgresql start mkdir /home/pgdir chown postgres:postgres /home/pgdir -R chmod 777 /home/pgdir -R  su postgres initdb -D /home/pgdir pg_ctl -D /home/pgdir -l /home/pgdir/log start 

1. Accessing remote files in sublime ssh -R 52698:localhost:52698 root@192.xxx.xxx.xxx => run this command in local  root@192.xxx.xxx.xxx  - it is the target remote ip from where you are referring the file to edit in local Install remote sublime at remote server curl -o /usr/local/bin/rmate https://raw.githubusercontent.com/aurora/rmate/master/rmate sudo chmod +x /usr/local/bin/rmate rmate filename

Find count of files in a folder ls -l /san1/home/ports/Quest/QuestHL7incoming/new/prod/comite_part1_2xx/ | wc -l Enable/Disable firewall CentOS V < 7 service iptables list service iptables start service iptables stop CentOS V >= 7 Status: systemctl status firewalld   Start: systemctl start firewalld   Stop: systemctl stop firewalld   Login to a server without password run  ssh-keygen from source machine will create key stored at  ~/.ssh/id_rsa.pub copy the code alone and paste in the destination server > autorised_keys  /root/.ssh/authorized_keys => if not exists in the destination server, you can create it

Run the following command under rails console to trace which file raising issue upon precompiling JS_PATH = "app/assets/javascripts/**/*.js"; Dir[JS_PATH].each do |file_name| puts "\n#{file_name}" puts Uglifier.compile(File.read(file_name)) end