Questions tagged [rhel7]
Red Hat Enterprise Linux version 7 is a Linux distribution sold by Red Hat, Inc. for the enterprise market. It is used for both servers and desktops. Although the binaries are not freely available, the sources are, and so there are numerous projects which provide compatible rebuilds of RHEL, such as CentOS and Scientific Linux.
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LVM disk is corrupt - is any data recoverable?
Under RHEL7 we have a logical volume consisting of 27 volume groups PVs. Each of these VGsPVs was added sequentially as we ran out of space on the LV.
We do not have a backup of the data. There are ...
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Cannot kill -9 Trend Micro Deep Security Agent
My company has deployed Trend Micro Deep Security on our RHEL server per regulation.
The usual way to enable/disable the agent is through Deep Security's management console.
However I am tasked with ...
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HPC node, Infiniband is DOWN
I have an HPC with 17 nodes running CentOS 7 and a dedicated Mellanox SX6036 Infiniband switch, each node has an Infiniband FDR interface.
Recently one node started giving errors and a quick look ...
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Remote call of NRPE comman fails in one case, while succeeding locally in all
I have amazingly strange issue with monitoring a CIFS (SMB) shared folder mounted to Linux machines by Nagios + NRPE.
NRPE process runs on the Linux machines under dedicated user nrpe:
# systemctl ...
- 155
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2
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217
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Red Hat Enterprise 7.4 End-of-Life status
I would like to get a definitive and authorized answer on the end-of-life of RHEL 7.4.
I tried to find information via
https://access.redhat.com/support/policy/updates/errata#...
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1
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120
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Avoid SSH AgentForwarding of incompatible keys
Good morning,
I have one ed25519-sk key (using a hardware token), which I need only on my personal machine for some high security servers (all Debian). This key type is supported by OpenSSH 8.3+. We ...
- 375
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22
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How to find the source of operation in netlink
There's a route I'm trying to add that seems to be automatically deleted by something in my OS/kernel itself. I can't seem to get the origin of this or the reason.
When I add the route, the command ...
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1
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42
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How to redirect http to https in NGINX in existing nginx.conf
I'm on RHEL7.9 Linux. I have a server (IP a.b.c.d) serving a webApplicationA and using https in nginx and it's working accessible at https://a.b.c.d.
On that same machine (same IP, a.b.c.d) I have an ...
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CIS RHEL shows "This is system is not registered with an entitlement server you can use subscription manager to register" [duplicate]
Hey guys I purchased and deployed a CIS hardened image of RHELv 7.9 on my azure platform but now it shows the above message when I run the yum command to install or update something.
If I am not ...
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1
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Audit Log Partition keeps getting corrupted. How to prevent or boot anyway?
I am running RHEL7, and my audit log partition randomly (not often, but often enough to annoy me) gets corrupted, preventing me from booting. How can I either prevent the partition from being ...
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How application choose which address will use for outcoming communication
I have a proprietary Linux distribution based on RHEL 7 and am trying to deal with the following issue. The machine has one primary network interface with two IP addresses assigned. The first one is ...
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2
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803
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Safe way to clear all packages from yum cache?
I know that yum clean all doesn't necessarily clear all the package files. I know from "Maybe you want: rm -rf /var/cache/yum" that I might have to, good grief, bluntly clear all of /var/...
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23
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locale setting for rhel7/8
In RHEL7/8 I know we control the locale setting using localctl command and which updates the /etc/locale.conf file.
Ex :
# localectl set-locale LANG=ja_JP.utf8
# localectl set-keymap jp106
# localectl
...
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94
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RHEL won't update correctly a package for security
What does that error even mean?
I have tzdata package. I run yum update --security and I get this:
[dada@dada-dada-dispatcher aem]# yum update --security
Failed to set locale, defaulting to C
Loaded ...
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15
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Marking services for killing in a resource-starvation situation
We use systemd --user to run certain services of our own. In some cases, these "get out of hand" -- spawn way too many processes, which exhausts RAM and causes the machine to "thrash&...
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Sudo: Using arguments in /etc/sudoers.d/ file, particularly with mount (visudo rejects syntax)
I have a syntax wrangling problem with sudo that may not be solvable.
I know I know, OpenBSD's new doas is better than sudo, but it is not available on CentOS 7 or Rocky 8. So we're stuck with sudo ...
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2
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64
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Dell PE RHEL 7 terrible performance
We have an 'old' Dell PE r740xd server with quite high specs, installed with rhel 7 (latest).
Running ls -l on / can take minutes.
Some specs:
# lscpu
Architecture: x86_64
CPU op-mode(s): ...
- 5,729
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2
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151
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Force deleted files on NFS server to be recycled instead
I have a RHEL 7.9 server I'm using as a file server. It exposes an XFS partition over NFS for clients to mount and use. I am willing to use a different filesystem than XFS if need be, but I cannot ...
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297
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MariaDB 10.3 won't restart after upgrade from 10.2 on RHEL 7
Could anyone please let me know what I am doing wrong after an upgrade from MariaDB10.2 to 10.3
[db@hawk ~]systemctl status mariadb.service
? mariadb.service - MariaDB 10.3.36 database server
...
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2
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2k
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RHEL leapp upgrade fails on reboot
I am trying to upgrade several physical servers from RHEL 7.9 to RHEL 8.6 offline. So far the process was successful on 1 server. On the server that I have the issue everything works fine and when I ...
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556
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CIFS Mount Share: Permissions on one File Seemingly Corrupted
I have a multi VM Windows (Server 2019) solution, hosted in a datacentre, with services which require a Redis cache. Due to security concerns, the Windows fork of Redis is not allowable. Therefore, I ...
- 557
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1
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369
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Kubernetes Pods Getting in Pending State Forever
We have a CronJob which will run every 'x' minutes.
For each and every Schedule, A Pod will be Scheduled and it runs and it is doing its job.
Now, After 2-3 days, The Pod is getting into Pending State ...
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258
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In rhel 7, wrong fs type, bad option, bad superblock error is coming while mounting LV device
wrong fs type, bad option, bad superblock error occurred while remounting the lv. PLEASE ANYONE CAN PROVIDE SOLUTION.
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394
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Yum install/update hangs at the very end, unable to kill via ctrl-c
So I've got a group of servers (all RHEL 7.9) whose RPMDBs appear to have become corrupted. Not sure how or when, but no matter.
I fixed the DBs using these instructions. After that, any attempt to ...
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1
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670
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Using internet on remote server via SSH tunnel
I have a RHEL server accessible via jump host only. This is how i am connecting to it
MyMachine(Win10)--SSH-->JumpHost(winserver2012r2)--SSH-->RHEL7
via ssh
ssh -J user@jumphost user@RHEL7
I ...
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0
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138
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RHEL 7 systemctl: Combine multiple services into one. start the service independently
I have followed the steps from RedHat to start the multiple services into one service.
https://access.redhat.com/solutions/3097871
/etc/systemd/system/myapps.target
[Unit]
Description=App Service Unit
...
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1
answer
130
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Is it possible to use https with a Tang Network Bound Disk Encryption server?
Is it possible to use https with a Tang Network Bound Disk Encryption (NBDE) server?
Redhat's documentation casually says this is possible, but I can't find any examples of this anywhere and the ...
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63
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How to install TLS Cert (SAN?) on RHEL server behind a proxy?
I have a couple of RHEL server "clusters" - I'd call these loosely-coupled; they run artifactory and artifactory itself binds them together, rather than being coupled at an OS level - which ...
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2
answers
3k
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How to setup permanent MTU size in RHEL 7 for eth0 interface?
I am using RHEL 7 and trying to setup permanent MTU size to 8500. Not able to find a way to set it up permanently. The server does not have dhcp.conf file in it.
I am using below command for temporary ...
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1
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388
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Where does the configuration for routing rules come from on boot?
I am on RHEL7 with NetworkManager disabled and no additional legacy scripts installed.
Meaning, that I still use:
/etc/sysconfig/network-scripts/ifcfg-eth0
/etc/sysconfig/network-scripts/route-eth0
/...
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1
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61
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Failing SSH after disabling Root Login
After generating the private and public key for a RHEL Client and storing the public key in the authorized_keys folder of the RHEL 7 Server, I disabled the Root Login in the Server by going to /etc/...
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473
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./node_exporter: cannot execute binary file
I am using RHEL7.9 in my Virtual Box. I installed the binary file of node_exporter as explained in the official documentation. I tried to run node_exporter using the following command:
./node_exporter
...
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1
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486
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yum installation failed on RHEL 7
I tried to install telnet using yum with the following command:
yum install telnet
But I get the following error:
Error
How can I solve this and add third party repositories?
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2k
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No package epel-release available
I was trying to install epel-release in a freshly set RHEL 7. By the following command
yum -y install epel-release
And the output was following:
no package epel-release available
What was the reason ...
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0
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41
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Dependencies to install Prometheus 2.32.1 in RHEL 7.9
I am trying to install prometheus-2.32.1 in RHEL 7.9 in my virtualbox. But I am failing since it says that yum repository does not have the necessary repos. Can anybody tell me what are the ...
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1
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1k
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firewalld: blocking outgoing connections blocks also incomming connections
log4shell has caused us to improve the security of some servers. We want now also block outgoing traffic (as possible). The current firewall rules are:
/> firewall-cmd --list-all
public (active)
...
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2
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58
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Permissions of /dev/null wrong in KVM guest
My host node is RHEL7 running KVM from the 'updates' repo. On the host node, the permissions for /dev/null are:
crw-rw-rw-. 1 root root 1, 3 Dec 18 04:45 /dev/null
In an Alpine KVM guest (5.14, but ...
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1
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450
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yum not updating dependency during install
I have a situation where my-software requires my-common via:
Requires: my-common >= 1.2.0
During yum update my-software, my-common is not upgraded, and is left at version 0.0.1.
Why is yum not ...
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NFS mounted XFS file systems not visible using xfs_quota
With CentOS7, I made the leap to XFS (from ext4) and since then I have been unable to query quotas on NFS Clients via the quota or xfs_quota commands. The xfs_quota command also does not report any ...
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58
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Trying to partition aws linux server using shell script
When I created Amazon linux server(similar to Centos 7). I had these partitions
I am trying to create partitions using shell script
lsblk gives me following information
NAME MAJ:MIN RM SIZE ...
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5k
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$ xclock PuTTY X11 proxy: unable to connect to forwarded X server: Network error: Connection refused Error: Can't open display: XX.XX.XXX.XX:10.0
I getting below error when running xclock command to one RHEL 7 server
$ xclock
PuTTY X11 proxy: unable to connect to forwarded X server: Network error: Connection refused Error: Can't open display: ...
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How to use -proxy option explicitly with OpenSSL in RHEL 7
unable to use -proxy option in openssl command on RHEL7 server, same is working fine on RHEL8 is there any other way to use proxy with Openssl.
Below is the command used.
[root@testvm01 ~]# openssl ...
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275
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Tenable su+sudo and selinux
My Not-A-Sysadmin-Boss wants me to explain this but I can't really find an answer? When using TENABLE SC to scan a RHEL7 system the account used to do the scan connects via ssh then uses sudo to ...
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54
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What defines the "interval" when playing back Performance Co-Pilot data in pcp-atop?
I have PCP (Performance Co-Pilot) recording performance metrics on a RHEL 7 host. The recording cadence is set to Y seconds here:
/etc/pcp/pmlogger/control.d/local
When I copy the performance metrics ...
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1
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71
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How to fix these vulnerability "" (CVE-2020-2781) ** Upgrade IBM Java to version 7.0.10.65 "" in rhel 7 server
I got this type of vulnerabilities on a rhel server after scan "(CVE-2020-2781) ** Upgrade IBM Java to version 7.0.10.65 Download and apply the upgrade from: https://www.ibm.com/developerworks/...
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100
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Linux - User name with a "$" cannot sudo
We are beginning to add our RHEL 7.9 Linux machines to AD. As a part of that we would like to restrict the use of sudo to the administrators. The admin group we will call ServerAdmins and we added it ...
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1
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66
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Switching from self-signed certificates to commerical TLS/SSL cert: will it work the way I expect?
New to the world of commercial certs, thanks in advance for any advice/guidance.
Our only outbound service is email, hosted on MS Exchange 2016 (2019 in medium-term future).
Internally we have several ...
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1
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630
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CentOS 7 (dracut) is finding inconsistent network device names causing problems for kickstart
I use the boot options biosdevname=1 net.ifnames=1 in order to get consistent, predictable device names. I'm starting to notice a problem where in some cases, the network device names are not ...
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396
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RHEL 7.9: rpm --eval "%dist" is now .el7_9 instead of just .el7
Here, we've recently upgraded some of our systems from RHEL 7.8 to RHEL 7.9, and I'm facing an issue related to the "dist" returned by the rpm tool.
In some scripts, we share between RHEL7 ...
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1
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1k
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Logging to /var/log/messages stopped. How to turn it back on?
while frantically trying to resolve a time sync issue, I somehow must have turned off some (but not all journalling). /var/log/messages ends last eventing, and journalctl -eu chronyd doesn't show any ...
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