How to solve a problem of NFS 'permission denied'

1. Created a new user at the QNAP server named 'username' and gave him full permission on the desired folder. For example, let's share the 'media' folder.2. Mounted the partition from the client machine[root@redhat ~]# mkdir /opt/mymedia/[root@redhat ~]# mount -t cifs -o username=username,password=user's_password,uid=application_name,gid=application_name //192.168.1.1/media /opt/mymedia/Testing:[root@redhat ~]# cd /opt/mymedia/[root@redhat mymedia]# lltotal 2-rwxr-xr-x 0 nginx nginx  7 2020-12-15 12:44 100.txt-rwxr-xr-x 0 nginx...

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How to monitor hardware RAID array status from Linux

 First check which raid card we are using:To find out which RAID you are using, just type one command to the command line:[root@school ~]# lspci -vv | grep -i raid15:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS-3 3108 [Invader] (rev 02) Kernel driver in use: megaraid_sas Kernel modules: megaraid_sasThere may be several responses to this request: 1. Hewlett-Packard is your HP RAID array 2. 3ware is your 3ware RAID array 3. megaRAID is your MegaRAID arrayIf we do not receive a response or some other answer,...

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MYSQL ERROR 1051 (42S02): Unknown table corrupttablename

Very rare we got a message to the browser saying "Unknown table tablename". Though we have the database and the table properly to the server. To solve the issue, we need to follow the below steps- ERROR 1051 (42S02): Unknown table corrupttablename [root@db ~]# service mysqld stop[root@db ~]# mv /var/lib/mysql/database_name/corrupttablename.frm /tmp[root@db ~]# service mysqld sta...

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How to capture network traffic using Wireshark & TCPdump

How to capture network traffic using Wireshark & TCPdump Using Wireshark (Grafical interface) Install wireshark: mahidul@mtr:~$ sudo apt-get install wireshark Or, download it from official site https://www.archlinux.org Error: Wireshark not listing interfaces on Ubuntu 12.04 precise pangolin Solution: mahidul@mtr:~$ sudo dpkg-reconfigure wireshark-common mahidul@mtr:~$ sudo usermod -a -G wireshark $USER mahidul@mtr:~$ sudo reboot Reference: http://it-connects.co/wireshark-not-listing-interfaces-on-ubuntu-12-04-precise-pangolin/ Using...

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Burning CD/DVD using CLI in linux (redhat/debian/ubuntu)

Burning CD/DVD using CLI: 1. find cdrom/dvdrom 2. make an iso     i. create an iso     ii. create an iso from collecting data from diffrent location     iii. add new data to an existence iso 3. burn the disk (cd/dvd)     i. single session burning     ii. Multi-session burning     iii. Blank a disk for re-writing cd/dvd (re-writable disk) 1. First findout the cd drive. Here my cd/dvd rom is dev=1,0,0 root@mahidul:~# cdrecord --devices wodim: Overview of...

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Install and Configure Hudson in redhat 6.x

Install and Configure Hudson in redhat 6.x Packages Requirements: . Java . Apache . Apache-tomcat Installing java: Download the leatest java from http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html#jdk-7u10-oth-JPR [root@hudson~]# mkdir -p /usr/jdk [root@hudson~]# tar -zxvf /Packages/jdk-7u10-linux-x64.tar.gz -C /usr/jdk/ [root@hudson~]# ls /usr/jdk/jdk1.7.0_10/ Installing Apache2: [root@hudson~]#...

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