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2235 articles
How to Disconnect Hung SSH Session [100% Working]
Steps to disconnect hung ssh session. Kill ssh session. Terminate stuck ssh session. Kill unresponsive ssh session. Disconnect pssh session in Linux
Linux copy directory and contents from remote to local & vice versa
Rsync and SCP recursive examples to copy directory and contents. scp from local to remote server and scp from remote to local. copy file from ssh to local or …
Bash: check if a string contains text, digits, or a prefix (`[[ ]]`, globs, regex)
Bash patterns to see if a string contains a substring or character, if it is only digits, if it starts with a prefix, and how [[ =~ ]] and globs differ— with …
Bash measure time of command and script (execution time, elapsed time)
Bash: measure time of a command, script execution time, and elapsed time (wall clock vs CPU). Use the time builtin, TIMEFORMAT, SECONDS, or EPOCHREALTIME; print …
Bash get script name, path, and directory (get script dir reliably)
Bash get script name, get current script name, get script path, and get script directory (script dir). Use $0, basename, BASH_SOURCE[0], dirname, cd+pwd, and …
10 practical examples to add or remove user from group in Linux
Linux add user to group. Linux remove user from group, remove multiple users from the group, remove users from multiple groups. list users in group Unix and …
Properly backup and restore partition table in Linux
How to backup or copy and restore partition table in linux. linux clone partition table, linux repair partition table
Revoke certificate and generate CRL OpenSSL [Step-by-Step]
Step by step instructions to revoke or delete certificate from keystone and generate CRL Certificate Revocation List) using openssl in Linux with example …
Steps to create Self-Signed Certificate with OpenSSL
Steps with openssl create self signed certificate Linux with and without passphrase. Use self signed certificate with Apache webserver example
Beginners guide on PKI, Certificates, Extensions, CA, CRL and OCSP
Understanding overview on PKI, Certificate Authority, Certificate Revocation Lists, Online Certificate Status Protocol, Certification Authorities & Hierarchies
Install & Configure OpenVPN Server Easy-RSA 3 (RHEL/CentOS 7) in Linux
Install and configure openvpn server and openvpn client with easy-rsa 3 in centos or rhel 7 linux. Create CA, CSR certificates for openvpn server client model.
Configure secure logging with rsyslog TLS to remote log server (CentOS/RHEL
Configure secure logging to remote log server with rsyslog TLS certificates in CentOS/RHEL 7 Forward syslog to remote log server securely using TLS certificates …
How to configure secure Kerberized NFS Server ( RHEL / CentOS 7)
Setup Kerberized NFS share secured with kerberos authentication for LDAP Users using IPA server on RHEL / CentOS 7 Linux added security with sec=krb5p NFS share …
Install & configure FreeIPA Server & Client (RHEL/CentOS 7)
Step by Step guide tutorial on how to install and configure FreeIPA, ipa server LDAP, kerberos, DNS and IPA client on RHEL/CentOS 7 Linux with GUI and CLI
How to restrict root user to access or modify a file and directory in Linux
Restrict and prevent access to root user for files and directories in linux using extended attributes chattr. Root and all users will be restricted to modify