CentOS is a Linux distribution standing for "Community ENTerprise Operating System" and is a rebuild of "Red Hat Enterprise Linux" (RHEL), belonging to the same company that distributes RHEL (Red Hat, Inc.). The "CentOS7" tag refers to versions 7.x-xxxx of CentOS, working only on 64-bit hardware. Maintenance updates for CentOS/RHEL 7 will stop on June 30, 2024, with full updates ceasing in winter of 2019.
Questions tagged [centos7]
2960 questions
23
votes
1 answer
php script can't access /tmp folder
I have no open_basedir, php can access /etc /usr /proc /home etc… but not /tmp.
tmpfs is mount on /tmp (/tmp type tmpfs (rw))
That's also the reason I want to use the /tmp folder.
My files are owned by http (user for nginx and php) and readable by…

eephyne
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23
votes
1 answer
Confused about -DFOREGROUND with Apache
So I just installed Apache on a new CentOS 7 server, using Yum. I've installed Apache many times before, but never have I seen this: When I run ps aux now, it always shows
/usr/sbin/httpd -DFOREGROUND
Google tells me that means the process will run…

Cocorico
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22
votes
4 answers
ZFS Datasets dissappear on reboot
I have installed ZFS(0.6.5) in my Centos 7 and I have also created a zpool, everything works fine apart from the fact that my datasets disappear on reboot.
I have been trying to debug this issue with the help of various online resources and blogs…

Vishnu Nair
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19
votes
3 answers
How do I update a system from CentOS 7 to CentOS 8?
Assuming that reinstalling from zero is not practical, how do I perform an update from CentOS 7 to CentOS 8?
I tried to do a yum install http://mirror.bytemark.co.uk/centos/8/BaseOS/x86_64/os/Packages/centos-release-8.0-0.1905.0.9.el8.x86_64.rpm but…

sorin
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19
votes
3 answers
php-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream
I am stacked with following errors on my site when I test 200 hits per second.
First I received 499 errors
2017-04-09 03:22:45 Error 162.158.79.219 499 GET / HTTP/1.1 0 nginx access
2017-04-09 03:22:45 Error 162.158.79.87 499 GET /…

Muhammad Hassaan
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19
votes
2 answers
Systemd Environment and EnvironmentFile not working
I've built an application and a systemd unit for it. The systemd unit works fine, but as the dev and prod environments have diverged I've started moving config out to environment variables and I can't seem to get them to work in systemd.
I've tried…

Keef Baker
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18
votes
1 answer
Getting Squid and TPROXY with IPv6 working on CentOS 7
I'm having trouble getting TPROXY working with Squid and IPv6 on a CentOS 7 server. I was previously using a generic intercept setup with NAT, but it was limited to IPv4 only. I'm now expanding the setup to include IPv6 with TPROXY.
I've been using…

James White
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18
votes
5 answers
Cannot conect MySQL (error 2026) after upgrade to Ubuntu 20.04
I cannot connect to MySQL 5.7.27 running on CentOS 7 server after upgrade of my workstation to Ubuntu 20.04 LTS. I am connecting using command mysql -h -u -p and after entering the password I get error 2026:
ERROR 2026…

yavor
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17
votes
6 answers
systemd : how to get the running target
Command systemctl get-default returns user-defined.target.
Then I use systemctl isolate multi-user.target to switch to multi-user.target.
I can see that a bunch of services that shouldn't be running on user-defined.taret and should be running on…

iamauser
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17
votes
4 answers
How to do a git pull/push using ansible
I am trying to do a git pull/push using ansible.
I am running ansible on one server and want to automate or orchestrate a git pull/push on a remote host.
Now since i didn't find a mmodule to do this on ansible doc website, i decided to go the script…

grant tailor
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16
votes
4 answers
Low-end hardware RAID vs Software RAID
I want to build a low-end 6TB RAID 1 archive, on an old pc.
MB: Intel d2500hn 64bit
CPU: Intel Atom D2500
RAM: 4GB DDR3 533 MHz
PSU: Chinese 500W
NO GPU
1x Ethernet 1Gbps
2x SATA2 ports
1x PCI port
4x USB 2.0
I want to build a RAID1 archive on…

Igor Z.
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16
votes
3 answers
How can I permanently set ulimit -n 8192 in Centos 7?
I would like to permanently set the open file limit for all users in Centos 7, but there seems to be a lot of conflicting information out there on the googles.

jestro
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15
votes
3 answers
How did installing this RPM create a file?
Running yum install https://extras.getpagespeed.com/redhat/7/noarch/RPMS/getpagespeed-extras-release-7-1.el7.gps.noarch.rpm creates /etc/cron.d/sysstat2 but RPM disavows the file:
# rpm -ql…

Pascal
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15
votes
3 answers
safely upgrade glibc on CentOS 7
I've tried a python application on my CentOS machine and it gives me the following error:
ImportError: /usr/lib64/libc.so.6: version `GLIBC_2.18' not found (required by /tmp/_MEI2BYIr4/libstdc++.so.6)
I've been tempted to upgrade GLIBC, but after…

Paco el Cuqui
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15
votes
1 answer
Disable SSL check rpm
When trying to run any rpm command I get the follow error. I am not sure why i am getting a curl error but i have tried many different options which have all failed.
Running CentOS7 and behind a proxy
[root@CentOS7]# rpm -Uvh…

Anthony Fornito
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