Category: Linux – Page 2

geekbench

Posted on February 27, 2021 by ServerOk

To benchmark server with GeekBench, you can run

wget https://raw.githubusercontent.com/serverok/server-setup/master/benchmark/geekbench-5.sh
bash ./geekbench-5.sh

1 2	wget https://raw.githubusercontent.com/serverok/server-setup/master/benchmark/geekbench-5.sh bash ./geekbench-5.sh

You can create an account on https://browser.geekbench.com and keep all your benchmaks in one place. Here is my Geekbanch benchmarks https://browser.geekbench.com/user/55314 If you get error installing, you may need to install depency with

yum install libgcc.i386 libstdc++.i386 libgcc.i686 libstdc++.i686 -y

1	yum install libgcc.i386 libstdc++.i386 libgcc.i686 libstdc++.i686 -y

See Benchmark […]

aaPanel – Free Hosting Control Panel

Posted on February 24, 2021 (February 24, 2021) by ServerOk

aaPanel is a free hosting control panel written in Python. https://www.aapanel.com To reload nginx, run

/www/server/nginx/sbin/nginx -s reload

1	/www/server/nginx/sbin/nginx -s reload

Nginx configuration file location

/www/server/nginx/conf/nginx.conf
/www/server/panel/vhost/nginx/

1 2	/www/server/nginx/conf/nginx.conf /www/server/panel/vhost/nginx/

See Hosting Control Panel […]

runuser

Posted on February 21, 2021 (March 31, 2021) by ServerOk

Linux Run Command as another user Install Xfce VNC remote desktop on Ubuntu […]

sudo

Posted on February 21, 2021 (February 21, 2021) by ServerOk

Linux Run Command as another user usermod […]

Linux Run Command as another user

Posted on February 21, 2021 (February 21, 2021) by ServerOk

To run command as another user on Linux, you can use

su USER_NAME_HERE -s /bin/bash -c COMMAND_HERE

1	su USER_NAME_HERE -s /bin/bash -c COMMAND_HERE

sudo -u USER_NAME_HERE COMMAND_HERE

1	sudo -u USER_NAME_HERE COMMAND_HERE

runuser -l  USER_NAME_HERE -c 'COMMAND_HERE'

1	runuser -l USER_NAME_HERE -c 'COMMAND_HERE'

See sudo […]

Bash check if a program is running or not

Posted on February 18, 2021 by ServerOk

You can find process id for a running program with command

pidof BINARY_NAME_HERE

1	pidof BINARY_NAME_HERE

Example

boby@sok-01:~$ pidof gedit
22057
boby@sok-01:~$ ps aux | grep gedit
boby       22057  4.4  0.7 822760 60280 ?        Sl   14:29   0:00 /usr/bin/gedit --gapplication-service
boby       22071  0.0  0.0   8904   644 pts/0    S+   14:29   0:00 grep --color=auto gedit
boby@sok-01:~$

boby@sok-01:~$ pidof gedit

22057

boby@sok-01:~$ ps aux | grep gedit

boby 22057 4.4 0.7 822760 60280 ? Sl 14:29 0:00 /usr/bin/gedit --gapplication-service

boby 22071 0.0 0.0 8904 644 pts/0 S+ 14:29 0:00 grep --color=auto gedit

boby@sok-01:~$

We can use pidof command in bash script to find if a program is running or not

if [ "$(pidof chrome)" ]
then
	echo "chrome already running."
fi

if [ "$(pidof chrome)" ]

then

echo "chrome already running."

See bash […]

CWP not working after hostname SSL install

Posted on February 10, 2021 (February 10, 2021) by ServerOk

On a CentOS Web Panel (CWP) server, control panel stopped working after installing SSL certficate for hostname. When starting cwpsrv service, i get following error.

[root@nvme ~]# systemctl start cwpsrv
Job for cwpsrv.service failed because the control process exited with error code. See "systemctl status cwpsrv.service" and "journalctl -xe" for details.
[root@nvme ~]# systemctl status cwpsrv.service
● cwpsrv.service - CentOS Web Panel service (daemon)
   Loaded: loaded (/usr/lib/systemd/system/cwpsrv.service; enabled; vendor preset: disabled)
   Active: activating (auto-restart) (Result: exit-code) since Wed 2021-02-10 04:51:53 CET; 1s ago
  Process: 3779 ExecStartPre=/usr/local/cwpsrv/bin/cwpsrv -t (code=exited, status=1/FAILURE)

Feb 10 04:51:53 nvme.ssdnodo.com systemd[1]: Failed to start CentOS Web Panel service (daemon).
Feb 10 04:51:53 nvme.ssdnodo.com systemd[1]: Unit cwpsrv.service entered failed state.
Feb 10 04:51:53 nvme.ssdnodo.com systemd[1]: cwpsrv.service failed.
[root@nvme ~]# /usr/local/cwpsrv/bin/cwpsrv -t
cwpsrv: [emerg] annot load certificate key "/etc/pki/tls/private/hostname.key": BIO_new_file() failed (SSL: error:02001002:system library:fopen:No such file or directory:fopen('/etc/pki/tls/private/hostname.key','r') error:2006D080:BIO routines:BIO_new_file:no such file)
cwpsrv:configuration file /usr/local/cwpsrv/conf/cwpsrv.conf test failed
[root@nvme ~]#

[root@nvme ~]# systemctl start cwpsrv

Job for cwpsrv.service failed because the control process exited with error code. See "systemctl status cwpsrv.service" and "journalctl -xe" for details.

[root@nvme ~]# systemctl status cwpsrv.service

● cwpsrv.service - CentOS Web Panel service (daemon)

Loaded: loaded (/usr/lib/systemd/system/cwpsrv.service; enabled; vendor preset: disabled)

Active: activating (auto-restart) (Result: exit-code) since Wed 2021-02-10 04:51:53 CET; 1s ago

Process: 3779 ExecStartPre=/usr/local/cwpsrv/bin/cwpsrv -t (code=exited, status=1/FAILURE)

Feb 10 04:51:53 nvme.ssdnodo.com systemd[1]: Failed to start CentOS Web Panel service (daemon).

Feb 10 04:51:53 nvme.ssdnodo.com systemd[1]: Unit cwpsrv.service entered failed state.

Feb 10 04:51:53 nvme.ssdnodo.com systemd[1]: cwpsrv.service failed.

[root@nvme ~]# /usr/local/cwpsrv/bin/cwpsrv -t

cwpsrv: [emerg] annot load certificate key "/etc/pki/tls/private/hostname.key": BIO_new_file() failed (SSL: error:02001002:system library:fopen:No such file or directory:fopen('/etc/pki/tls/private/hostname.key','r') error:2006D080:BIO routines:BIO_new_file:no such file)

cwpsrv:configuration file /usr/local/cwpsrv/conf/cwpsrv.conf test failed

[root@nvme ~]#

To fix this, i run

/usr/local/cwpsrv/htdocs/resources/scripts/generate_hostname_ssl

1	/usr/local/cwpsrv/htdocs/resources/scripts/generate_hostname_ssl

This generated the self signed SSL for hostname. After this CWP control panel started working. Apache still was down, fixed it by removing […]

Auto restart newrelic-daemon if crashed

Posted on February 8, 2021 by ServerOk

On a web server with Newrelic APM installed, graph stopped showing new data. On checking the newrelic log file, i get following error

root@new-website-2:~# tail -f /var/log/newrelic/php_agent.log
2021-02-08 17:21:27.453 +0000 (680439 680439) warning: daemon connect(fd=13 uds=@newrelic) returned -1 errno=ECONNREFUSED. Failed to connect to the newrelic-daemon. Please make sure that there is a properly configured newrelic-daemon running. For additional assistance, please see: https://newrelic.com/docs/php/newrelic-daemon-startup-modes

root@new-website-2:~# tail -f /var/log/newrelic/php_agent.log

2021-02-08 17:21:27.453 +0000 (680439 680439) warning: daemon connect(fd=13 uds=@newrelic) returned -1 errno=ECONNREFUSED. Failed to connect to the newrelic-daemon. Please make sure that there is a properly configured newrelic-daemon running. For additional assistance, please see: https://newrelic.com/docs/php/newrelic-daemon-startup-modes

This is because newrelic-daemon stopped working. To auto restart newrelic-daemon if it crash, do the following

mkdir -p /usr/serverok
vi /usr/serverok/newrelic

1 2	mkdir -p /usr/serverok vi /usr/serverok/newrelic

Add following to the file

#!/bin/bash
# Author: ServerOK
# Web: https://serverok.in/auto-restart-newrelic-daemon

CURRENT_STATUS="$(/etc/init.d/newrelic-daemon status)"

TIME_STAMP="$(date "+%Y-%m-%d %H:%M:%S")"

if [[ ! "${CURRENT_STATUS}" =~ "newrelic-daemon is running" ]]
then
    /etc/init.d/newrelic-daemon start
    echo -e "${TIME_STAMP} newrelic-daemon down\n"
fi

#!/bin/bash

# Author: ServerOK

# Web: https://serverok.in/auto-restart-newrelic-daemon

CURRENT_STATUS="$(/etc/init.d/newrelic-daemon status)"

TIME_STAMP="$(date "+%Y-%m-%d %H:%M:%S")"

if [[ ! "${CURRENT_STATUS}" =~ "newrelic-daemon is running" ]]

then

/etc/init.d/newrelic-daemon start

echo -e "${TIME_STAMP} newrelic-daemon down\n"

Make the script executable

chmod 755 /usr/serverok/newrelic

1	chmod 755 /usr/serverok/newrelic

Create a cronjob […]

bash check if a folder is empty or not

Posted on February 3, 2021 by ServerOk

To check if a folder is empty of not, you can use

if [ "$(ls -A /home/boby/1/ )" ]
then
    echo "Files found"
else
    echo 'No files found'
fi

if [ "$(ls -A /home/boby/1/ )" ]

then

echo "Files found"

else

echo 'No files found'

If you want to reverse the checking, you can use !

if [ ! "$(ls -A /home/boby/1/ )" ]
then
    echo "No files found"
else
    echo 'Files found.'
fi

if [ ! "$(ls -A /home/boby/1/ )" ]

then

echo "No files found"

else

echo 'Files found.'

See bash […]

bash: warning: setlocale: LC_ALL: cannot change locale

Posted on January 23, 2021 by ServerOk

On an Ubuntu server, when i login, i get following error

-bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)

1	-bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)

To fix this, run

echo "LC_ALL=en_US.UTF-8" >> /etc/environment
echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen
echo "LANG=en_US.UTF-8" > /etc/locale.conf
locale-gen en_US.UTF-8

echo "LC_ALL=en_US.UTF-8" >> /etc/environment

echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen

echo "LANG=en_US.UTF-8" > /etc/locale.conf

locale-gen en_US.UTF-8

See Errors […]