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Category: Linux

SFTP remote readdir Permission denied error
May 18, 2020 Linux

SFTP remote readdir Permission denied error

Problem Getting below error after connecting to SFTP server: # sftp sftp_user1@dbappweb.com sftp_user1@dbappweb.com's password: Connected to dbappweb.com. sftp> ls remote readdir("/incoming"): Permission denied   Reason I was getting the “Permission denied” error because SELinux was enabled on the SFTP servers and it was enforcing. The status …
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How to Setup Chroot SFTP in Linux (Allow Only SFTP, not SSH)
May 18, 2020 Linux

How to Setup Chroot SFTP in Linux (Allow Only SFTP, not SSH)

Chroot SFTP in Linux Sometimes we need to transfer or access some files on a server through SFTP. In these cases we need to restrict the users so that they can access the files in their home directories only, other directories or files of the server …
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Define Password Policy and Aging in Linux/RHEL 6
August 23, 2019 Linux

Define Password Policy and Aging in Linux/RHEL 6

Check the /etc/login.defs file to check the applied password policy, here it is showing that password expiry days define as 99999 i.e. it will never expire. # cat /etc/login.defs . . . # Password aging controls: # # PASS_MAX_DAYS Maximum number of days a password may …
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Partitioned Disk Not Found in Linux,  cannot access : No such file or directory
August 19, 2019 Linux

Partitioned Disk Not Found in Linux, cannot access : No such file or directory

Problem I have added a new disk to the Linux server but after creating the partition using fdisk command, the partitioned disk was not found, as shown below: # fdisk /dev/mapper/mpathq Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building …
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How to Set or Change System Hostname in RHEL 7
August 14, 2019 Linux

How to Set or Change System Hostname in RHEL 7

Problem How to set or change the system hostname in Red Hat Enterprise Linux 7 Solution Follow the below process to set or change the system hostname in Linux 7: Login into the system as root or superuser and type the command nmtui. It will open …
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How to Generate Certificate Signing Request (CSR) for Apache Using OpenSSL
February 8, 2019 Linux, Web Servers

How to Generate Certificate Signing Request (CSR) for Apache Using OpenSSL

Certificate Signing Request (CSR) is required for placing an order to obtain an SSL certificate from any SSL certificate provider.  You can create your certificate signing request (CSR) for your Apache web server with the OpenSSL utility. OpenSSL utility comes with the OpenSSL package and is …
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Device /dev/mapper/mpathlp1 not found (or ignored by filtering)
December 11, 2018 Linux

Device /dev/mapper/mpathlp1 not found (or ignored by filtering)

Problem I have exported a new volume of 2TB from my SAN to a Linux server but after scanning and partitioning the disk when I tried to create the physical volume then I got the below error: # pvcreate /dev/mapper/mpathlp1 Device /dev/mapper/mpathlp1 not found (or ignored by …
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Cannot mount NFS share in RHEL 7: wrong fs type, bad option, bad superblock
September 27, 2018 Linux

Cannot mount NFS share in RHEL 7: wrong fs type, bad option, bad superblock

Problem I have configured a new server with RHEL 7.4 as a web server. I tried to mount an NFS shared folder on this machine and got the below error: # mount -o tcp nfsserver:/upload /home/upload mount: wrong fs type, bad option, bad superblock on 10.30.1.62:/upload, missing …
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Installing the bigfix 9.x agent on RedHat Linux
June 30, 2018 Linux

Installing the bigfix 9.x agent on RedHat Linux

Bigfix Agent Installation Prerequisite for RedHat Before installing the client on Red Hat Enterprise Linux 6 or later, ensure you have: 1. Disabled the SELinux process status of the SELinux can be checked by using the command getenforce. # getenforce Enforcing To disable the SELinux feature you need …
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How to Disable SELinux in RHEL
June 28, 2018 Linux

How to Disable SELinux in RHEL

SELinux (Security-Enhanced Linux) When we install a new RHEL OS on any machine then by default SELinux feature becomes Enforcing. You can disable it at the time of installation of RHEL OS but if you forget to change it then you can change it later but …
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