New answers tagged centos
0
votes
rpm database lost, how to proceed?
You download and install using rpm the centos-release-XX-XX.noarch.rpm package.
find /usr /etc -type f -print0 | xargs -0 -P$(nproc) dnf --cacheonly whatprovides | sort -u > /tmp/packages.txt
You ...
- 18.4k
2
votes
What should be the equivalent apport package for CentOS 8
CentOS/RHEL has a similar tool called ABRT. Its primary function is reporting the issues to RH bugzilla (or customer portal), but you can also configure it to send an email or just let it collect logs ...
- 12.6k
3
votes
Tried to open external harddrive img file
Use losetup to associate the image file with a free /dev/loopN device:
losetup -P -f /mnt/usb/vdisk1.img
This will report the name of the actual loop device used: if there are no other loop devices ...
- 66.8k
1
vote
Tried to open external harddrive img file
Use losetup to create a loop device from the image
losetup -P -f /mnt/usb/vdisk1.img
the content of the image will be available as /dev/loopX, if the LVM structure on it isn't auto activated use vgs ...
- 12.6k
0
votes
Yum repository giving 404 on primary_db
Check
https://yum.example.com/yum/EPEL/7/x86_64/repodata/repomd.xml. The links in that file are most likely outdated and need to be updated by the repo admin.
0
votes
Can't monitor Kickstart post-install log
The problem is with carriage return if you use
echo "message" >/dev/tty1
Try instead
echo -e "message\r" >/dev/tty1
- 1
2
votes
Accepted
Why CentOS converts ATA bus to scsi bus?
This is how the Linux kernel handles Parallel ATA (IDE). Initially, there was a set of IDE-specific drivers, and IDE drives appeared as hda etc. But when Serial ATA came on the scene, Jeff Garzik ...
- 354k
1
vote
Accepted
How to update, instead of flush and re-write, iptables rules
If there are specific rules that need to be updated regularly, I would put them in a separate chain, calling that chain from INPUT in an appropriate slot
iptables -N mychain # Create ...
- 88.9k
1
vote
How to update, instead of flush and re-write, iptables rules
Replacing Rules is possible.
Here is an example:
First you can create a rule at the top (first) position with this command :
iptables -I INPUT 1 -p tcp --dport 80 -j ACCEPT
Rules can be specified to ...
1
vote
Accepted
Change prompt colour inside midnight commander?
You cannot make the prompt colorized.
But mc has an ability to change color themes, look in Options/Appearance. There are many themes already exist and you can choose one you like the most. Or create ...
- 1,163
0
votes
File contains no section headers on Centos
As a safer solution, it's just enough to rename that repo file:
# cd /etc/yum.repos.d/
# mv <repo_file>.repo <repo_file>.repo.orig
2
votes
copy network configuration from one linux machine to another
No.
that allows it to directly access certain URLs that I can only otherwise access through a VPN on other machines
The most likely reason is that this machine's IP address (or at least the IP ...
- 4,225
0
votes
Firmware packages: What do they actually do?
refer to other people's answers, and online docs
try to compare it with related things which linux users may often see.
//May not be completely accurate, improvements are welcome
linux-firmware
...
- 207
6
votes
Accepted
Prevent shell script from hanging on a line
Instead of piping df's output into grep (which causes df to query all mounted filesystems, even those which are not responding - e.g. a hung NFS mount), give df the fileystem(s) you want info on as ...
- 66.6k
1
vote
Accepted
What should be the equivalent logrotate script for CentOS 8
I suggest you use what the base CentOS httpd package uses in its httpd.logrotate:
/var/log/httpd/*log {
missingok
notifempty
sharedscripts
delaycompress
postrotate
/bin/...
- 22.9k
0
votes
/var keeps filling due to yum cache
There are several ways to deal with issues like this, including:
Increase the size of the /var partition (or the / partition if /var isn't a mount-point). If you're using LVM (or btrfs or zfs), this ...
- 66.6k
0
votes
Wireguard transfer of external ip address
Client ip 24.18.22.12 -> Wireguard host (98.XX.XX.XX) -> Internal web server (192.168.0.2) (Internal web server seen client ip original 24.18.22.12, no wireguard gateway)
Well, you're doing NAT,...
- 7,704
3
votes
blocking commands as non-root
You can create a directory in your home, create some files with the
names of programs you want to restrict and prepend it to your
$PATH. For example:
$ mkdir ~/bin
Create ~/bin/links with the ...
2
votes
Accepted
How to troubleshoot a LDAP error 53 (WILL_NOT_PERFORM)?
The error you are encountering is coming from the Active Directory server itself. So the verbose error message, if it exists, is likely to be in the "Event Log" on the Active Directory ...
- 14.4k
0
votes
Why 7z not using enough CPU?
Mystery solved: 7za a -mx=9 -mmt=4 - note 4 threads although the VM has 3 vCPUs only.
Now it uses 100% CPU.
Helped by the 7z author: https://sourceforge.net/p/p7zip/discussion/383043/thread/15831e05/#...
- 119
0
votes
Can I run a script on reboot once?
I have split the script to 2 different jobs. One is running OS update and reboot and another (an hour later) is whatever is needed for logs collecting/zipping.
- 119
1
vote
Can I run a script on reboot once?
Not sure I understand what you need, but I see two ways to do what you described:
Make a "proper shutdown" script. Manage logs from it, set the file-flags for the next run (which would be ...
- 1,163
2
votes
Accepted
How to use wildcard for files without extension
* means zero or more of any character, . means the single character dot. So *.* means any names with a(t least one) dot in there somewhere. On Unix-likes, the dot is just a regular character in ...
- 115k
3
votes
How to use wildcard for files without extension
* does mean zero or more characters
so *.* means some characters, followed by a dot, followed by more characters, so will match foo.bar, foo. .bar, foo.bar.baz, but not foobar, because the dot in the ...
- 156
2
votes
Accepted
How to simulate +%100 CPU Usage for 1 process?
If you don't want to compile your own testing application which will use for example pthread_create(3) to create multiple threads, which will get each 100% CPU usage added to the process once they are ...
- 24.7k
0
votes
Accepted
CentOS - Find out which user spawned process after sudo su
You could use pstree -u ...
This should show you the uid transitions.
I just did a test against a box, launching top via su - user2 -c top ....
|-sshd-+-sshd---sshd(user2)---bash---screen
...
- 5,548
-1
votes
How to Increase swap space in a CentOS VM
we can increase Swap with out LVM
1. dd if=/dev/zero of=/path/swapfile bs=<swapsizein gB> count=1
/path/swapfile ====> its the pathfile where available space is there and you can create ...
- 4,690
0
votes
Accepted
Centos 8 vs Almalinux, is it okay to upgrade? A help to understand how to change OS
AlmaLinux is 1:1 with RHEL, CentOS 8.5 is no longer supported (as from 31/12/2021) and so as time goes on differences will appear. At the moment they are mainly bugfixes so there should be a ...
- 744
3
votes
Accepted
Install mailx on CentOS 9
According to Bugzilla Bug 2001537 "mailx -> s-nail replacement in CentOS Stream 9", mailx was replaced by s-nail. There's also a reference to the same in the Red Hat's "...
- 63k
0
votes
How to find the required dependency software on CentOS?
You can use the command yum deplist <package> to get all the depencies
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