Questions tagged [dev]

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Centos 7: (re)discover SCSI device removed by kernel

I have a PowerVault with a RAID 5 array attached to a PowerEdge server running CentOS 7.9.2009. One of the disks in the array failed and apparently the kernel then removed the array. Here are some ...
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1 answer
37 views

Debian/Ubuntu, inconsistency between S-ATA ports numbering and /dev/sdX lettering [closed]

The hardware situation is as such : a motherboard (MSI X99A SLI Plus), two (2) Samsung 860 Pro SSDs connected on SATA-1 and SATA-2 of the motherboard. five (5) identical HDDs connected on SATA-3, ...
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1 answer
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Server space issue : how to merge drives

my server is having space issue below is what is see when using df -h, my space of /dev/m2 is getting fulled say 99% frequently and it causes issue with my sessions and all , i want merge /dev/m3 with ...
1 vote
0 answers
32 views

how to manage Multiple User Acceptance Tests at once

Our current setup has the following environments: development testing staging production We are finding that things are being held back at the testing phase due to UAT taking longer than expected ...
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1 vote
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Accidentally moved /bin, /boot, /dev and /etc folders

So as I was installing a new website, I incorrectly entered: mv wordpress /* . The space between "wordress" and "/*" was unitentional. Folders affected were: /bin /boot /dev /etc I Ctrl + C'd quit ...
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2 answers
2k views

centos-7 missing /dev/net/tap

Going ls -l /dev/net shows the tun device (device 10,200) but there is no tap entry. Any ideas on how to get it working? find /dev -name \*tap\* finds nothing CentOS Linux release 7.1.1503 (Core) ...
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2k views

nginx rewrite or internal redirection cycle while internally redirecting to /index.html

I know this question has been posted many times, but even with the help of those answers, I can't seem to figure this out. I'm a freelance web developer and just started maintaining and administering ...
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2 votes
1 answer
143 views

OpenBSD disk devices prefixes

Under OpenBSD, /dev/rsd0a means: raw access to the first, or root, slice (a) of the first (0) SCSI (sd) disk r says that the device is accessed in raw, character mode instead of the standard block ...
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1 vote
2 answers
1k views

Mount /dev/shm in FreeBSD jail

I would like to mount /dev/shm in a freebsd jail. Every time I attempt to, I get these errors: [root@gaming /]# mount -t tmpfs tmpfs /dev/shm mount: /dev/shm: No such file or directory [root@gaming /]...
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4 votes
1 answer
308 views

Why is my HDD partition a character special device?

I have a bunch of old 1T disks with an mdadm array on them. They had been out of commission for awhile, but yesterday I slotted them into a server running an up to date Debian Jessie. Eventually I ...
1 vote
1 answer
6k views

How to connect a /dev USB modem in an LXC container?

I've been struggling with various tutorials to hook up my /dev/ttyACM0 in a lxc container. Basically I've tried adding the following line in my lxc config : lxc.cgroup.devices.allow = c 166:* rwm ...
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31 votes
3 answers
6k views

Did a cat /dev/urandom - Broken terminal

Out of curiosity, when your shell character set breaks from doing something like cat /dev/urandom is there a way to fix that in place?
1 vote
2 answers
4k views

how to enlarge disk space on /dev/xvde1 for AWS ec2 instance?

I created an EC2 instance with type of m1.small and later found it's lack of space. I then stop the instance and change the type to m1.xlarge. However, I have no luck on getting more space. df -a ...
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1 vote
0 answers
1k views

I/O error on non-existent device?

Getting the following in /var/log/messages: Sep 17 10:38:53 server1 kernel: end_request: I/O error, dev sde, sector 0 Sep 17 10:38:53 server1 kernel: end_request: I/O error, dev sde, sector 63 Sep 17 ...
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3 votes
1 answer
468 views

Is /dev in linux virtual?

Today at work a client had rm -rf /dev and ended up deleting two files in /dev/shm that forced his site to no longer work. From what I learned previously /dev is not virtual, but a fellow technician ...
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4 votes
1 answer
7k views

SLES Devel Packages?

It seems SLES 11.2 (and OpenSUSE) are missing many devel (dev) packages common in other distros such as Ubuntu Server or CentOS. I understand that packages / deps may be wrapped up in other-named ...
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2 answers
631 views

How can I configure sendmail (or another mail server) to accept outbound mail, but to not send it out?

Is it possible to configure sendmail to accept all outbound email but to not send it out? Either it can just log them to be read later, or better yet, if it can be configured to send ALL outbound mail ...
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1 answer
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EC2 performance problem

just spent two days this week troubleshooting dev issue in EC2 logged by offshore team. have run apache/tomcat Version 7.0.21 in muliple Dev instances in EC2 for weeks with no problem. then major ...
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0 votes
1 answer
3k views

How can I expand the /dev/root partition?

How can I expand /dev/root? I can't seem to do this using an LVExtend command. Thanks, James
3 votes
1 answer
6k views

lsscsi finds sas device but none is listed in /dev

I have a server with 2 internal disks with Adaptec hardware RAID and an external disk box connected via SAS. lsscsi finds all the devices: # lsscsi [0:0:0:0] disk Adaptec System V1....
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