The Problem While executing yum commands user is getting below error: # yum update Bad id for repo: My Repo, byte = 2 The following is the repo file which is used for local dvd image # cat /etc/yum.repos.d/my_repo.repo [My Repo] name=repo1 baseurl=file:///mnt/iso/ enabled=1 gpgcheck=0 The Solution [My Repo] is wrong as it uses spaces between letters which are not properly translated by yum. Do not include white space in [My Repo]. So to correct it change the name file from … [Read more...] about “Bad id for repo: My Repo, byte = 2” yum update error
Archives for September 2018
How to disable lvmetad in CentOS/RHEL
What is lvmetad To improve performance and automatic activation of volume groups and logical volumes by udev, LVM makes use of a metadata cache. By default, LVM manages its metadata centrally using a daemon, lvmetad. How to disable lvmetad Sometimes, especially in a clustered environment, you may find that when you create a volume group on one node of the cluster, the same is not reflected on the other nodes of the cluster. This is mainly due to the cached metadata on the other nodes. Some … [Read more...] about How to disable lvmetad in CentOS/RHEL
How to view past performance with sar in Linux
There are many tools/utilities that can be used to analyze the current system performance. But how do we gauge the historic system performance? For that you can use the System Activity Report (SAR) tool. Using the sar tool, you will be able to look back over a period of time and see how the server has been running. In this post we will see how to install and use the sysstat tools; thus, allowing you to examine historical system statistics. Installing sysstat First thing first, install the … [Read more...] about How to view past performance with sar in Linux
How to Configure Separate Port For SSH and SFTP On CentOS/RHEL
Sometimes for the security reasons, there is a need to have a separate port for ssh and sftp on CentOS/RHEL. Here's a short how-to on configuring SSH on port 2222 and SFTP to work on port 22. 1. Since openssh-5.3p1-117.el6.x86_64 for separating the ssh and sftp port on the CentOS/RHEL systems, make changes to the /etc/ssh/sshd_config file and add the following modifications. # vi /etc/ssh/sshd_config Port 22 Port 2222 2. Comment the default subsystem and add the below subsystem. # vi … [Read more...] about How to Configure Separate Port For SSH and SFTP On CentOS/RHEL
What is OCFS or OCFS2
1. What is OCFS for Linux? OCFS is an open source clustered file system for Linux designed for use with Oracle RAC on Linux to store Oracle datafiles, redo logs, archive logs, voting disks, quorum files and control files. It is NOT a general purpose file system and should not be used to store a shared Oracle home. OCFS, also referred to as OCFS (Release 1), works with the 2.4 version and later of the Linux Kernel like RHEL, CentOS, SUSE. 2. What is OCFS2 for Linux? OCFS2 is the next … [Read more...] about What is OCFS or OCFS2
How to Change the Default Timeout Settings for Telnet Session in CentOS/RHEL
To modify the telnet timeout you need to change the value of the tcp keepalive parameters. Let us first check the default values of TCP keepalive parameter. # cat /proc/sys/net/ipv4/tcp_keepalive_time 7200 # cat /proc/sys/net/ipv4/tcp_keepalive_intvl 75 # cat /proc/sys/net/ipv4/tcp_keepalive_probes 9 The first two parameters are expressed in seconds, and the last is the pure number. This means that the keepalive routines wait for two hours (7200 secs) before sending the first keepalive … [Read more...] about How to Change the Default Timeout Settings for Telnet Session in CentOS/RHEL