Linux OS Materials
According to pwgen man page, “the pwgen program generates passwords which are designed to be easily memorized by humans, while being as secure as possible.” It returns multiple password options that meet the criteria you provide so that you can select the one that you prefer. ### Install pwgen On RHEL/CentOS Linux, you can install … Read more
Issue: Is it safe to disable Consistent Device Naming by setting net.ifnames=0 on the kernel command line in RHEL7, RHEL8 and RHEL9? Why can I no longer use the 70-persistent-net.rules file to force persistent ethX names like I could in earlier versions of Red Hat Enterprise Linux? Resolution: No. Red Hat strongly recommend that the … Read more
Why use HP Smart Storage Admin CLI? You can use ssacli (smart storage administrator command line interface) tool to manage any of supported HP Smart Array Controllers in your host without need to reboot your server to access Smart Storage Administrator in BIOS. That means no host downtime when managing your storage. CLI is not as convenient as GUI … Read more
Splunk Enterprise is a data platform designed to help businesses manage big data and analyze machine data. It can be deployed on-premises or in the cloud via the Splunk Cloud Platform and enables you to search, analyze and visualize your data to quickly act on insights from across your technology landscape. An Enterprise Splunk License … Read more
Splunk Enterprise is a data platform designed to help businesses manage big data and analyze machine data. It can be deployed on-premises or in the cloud via the Splunk Cloud Platform and enables you to search, analyze and visualize your data to quickly act on insights from across your technology landscape. Installing/Starting Splunk Enterprise 9.0.4 … Read more
Issue : When run the “ftp open” command, vsftpd terminated after buffer overflow detected printed. [root@unixonline ~]# ftp localhost Connected to localhost.localdomain. *** buffer overflow detected ***: /usr/sbin/vsftpd terminated ======= Backtrace: ========= /lib64/libc.so.6(__chk_fail+0x2f)[0x2b43730d0c5f] KERBEROS_V4 rejected as an authentication type Or “lftp” command “ls” is returned “Delaying before reconnect”. [root@unixonline ~]# lftp test@192.168.10.10:~> ls `ls’ at … Read more
In this scenario, we are going to recover removed file in Linux OS.for example: /data/mongodb/audit/sh0-prm-audit.log is removed. Find the deleted file by lsof command: [root@unixonline]# lsof | grep -i delete init 1 root 9r REG 253,7 10406312 528590 /var/lib/sss/mc/initgroups (deleted) hald 2706 haldaemon 19r REG 253,7 10406312 528593 /var/lib/sss/mc/initgroups (deleted) ntpd 2874 ntp 4r REG … Read more
In some scenarios, you might want to mimic a certain directory structure that already exists maybe for your personal projects or for a files storage system just because that directory structure makes perfect sense and might require a lot of time to completely recreate it from scratch. Following is the cool way of copying a … Read more
Use this procedure to remove NetBackup from UNIX and Linux servers and clients: NetBackup relational database (NBDB) location If you moved the NBDB files in /usr/openv/db/data from their default installation location, this procedure includes a step that describes how to remove these files. Clustered environments Before you begin to remove NetBackup, you must remove NetBackup from the … Read more
Problem:NetBackup introduces support for Oracle DB on the Unix/Linux platform, but the oracle_link script that is provided with the install fails to create the needed symbolic links between the Oracle installation directory and the NetBackup installation directory. Error Message:If the oracle_link script is executed, it will display a message similar to the following and backups … Read more