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Questions tagged [unix]

Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs.

Excerpt from the Wikipedia page

Unix was originally written in assembly but has since been rewritten in C. It has been branched many times both commercially and open source. One popular variant is the BSD variant which originated from the University of California, Berkeley. It also gave rise to Linux.

Notable variants

  • Silicon Graphics - Irix
  • IBM - AIX
  • Sun Microsystems - Solaris
  • Hewlett Packard - HP-UX

Unix is officially trademarked as UNIX.

Unix on Wikipedia

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LD_LIBRARY_PATH Configuration Setup Issues

I am facing a weird but a sensible issue, I have 2 ORACLE_HOMEs, 1st one points to ORACLE Database Software and 2nd one points to ORACLE Client Software. Why I am forced to do this - reason is: In my system Pro *c is getting compiled from ORACLE…
Gaurav Bhaskar
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Placeholder in bash/shell for defferent linux distr

i have some problem. I need to add in autorun of linux, some scripts. But in my infrastructure, i have a different distrs. Of course, the way of adding this scripts in autorun different. In CentOS it is chkconfig, in debian/ubuntu it is…
Piduna Valeriu
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dmesg log dump help

I keep having dumps in my dmesg logs, I suspect that it's the NIC making errors. Can someone give me their opinion? After this happens, I can't access the machine through the network. [28965.681498] swapper: page allocation failure. order:0,…
Disco
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Making open file descriptor limit unlimited in Debian

I am doing a perf test of one of my API. After some time I keep getting the error Too many open file. Once I increase the number of open file descriptor (ulimit -Hn, ulimit -Sn & cat /proc/sys/fs/file-max) then the request / sec my API can server…
tuk
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iptables, are all ports open? how do i remove line?

it´ been an long time i configured my firewall and now i see there might be an error, heres the INPUT part of iptables -L Chain INPUT (policy DROP) target prot opt source destination ACCEPT all -- anywhere …
john Smith
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Postfix arguments

According to another answer, I may need to set smtp_sasl_mechanism_filter = plain in order to get postfix to work correctly for my needs. My question: Is there a way to modify this setting from the CLI when I run sudo postfix start, rather than…
Mayor of the Plattenbaus
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chroot root jail with where you an only su out to registed user

Can i ask for some advice about securing ssh logins. Is this a good way. I want to have only one user allowed to connect to our remote servers(AllowUser in sshd.conf)Using ssh keys and NoPasswords. This user connect to a restricted shell withn a…
Christian Watts
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cpulimit, but for load? Pause a command until load avg goes below some figure?

The programme cpulimit on Linux is great. You can tell it to limit a process so that it doesn't use more than X% of the CPU. For example, I know someone who's laptop overheats if the CPU runs too hot for too long. When doing some video encoding,…
Amandasaurus
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cfgadm hangs when attempting to attach SCSI device

I'm trying to hot plug a EXB-8900 tape drive into Solaris 10 and having issues. Here's the process I follow. Please note this has worked: cfgadm -x insert_device c4 yes at the first prompt to suspend SCSI activity on the c4 HBA. Next I connect and…
grephappiness
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what are the reasons for umounting /proc filesystem?

I am trying to write an audit program for unixs systems. First I was thinking of getting all the outputs of various native commands, such as ifconfig, df, route, and so on, depending on the system the script is executed on. Besides being complicated…
philippe
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Standing Up Cisco CSR1000v .iso on Google Cloud Platform RHEL VM

I have a Cisco Cloud Service Router 1000v, CSR1000, .iso image that is advertised to run on KVM. I launched a RHEL 1 vCPU, 0.6 GB w assigned public IP and default private IP and uploaded the image. I was able to mount it and see the boot and…
Ronnie Royston
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How to limit FTP connections to a certain ip range?

I only want to be able to connect to my unix box via ftp from a small range of ips. other services (i.e., www , mail , ssh) should be from any ip as usual how can i set this up? thanks
nixnub
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abrt-ccpp ignores MaxCrashReportsSize and creates a huge dump :(

My abrt-ccpp service suddenly stopped capping the dumps at 10M and creates huge dumps - what am I missing? (I really haven't changed anything...) my dumps folder: sudo du -sh /home/tmp/abrt/* 12K /home/tmp/abrt/ccpp-2016-10-07-01:22:40-1838 17G …
ihadanny
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Use failover IP as a primary server IP

I bought a dedicated server which has its primary IP blacklisted, I am having a IP failover (NIC I believe) I'd like to use as a primary IP instead. Is action like that possible? if so, what can I do to achieve that?
Rusco
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When to use DNS for my linux architecture?

I understand that this is a server-fault question, and I will most likely close this after it's answered. But I really need this answer now, and since it's Halloween, serverfault has very few people on there! I really appreciate it everyone. Can…
Alex
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