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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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Monitoring User Account Time

Is there a good way (on networked *nix systems) to keep track of how much time user accounts have been logged in on a daily/weekly/monthly basis? Also, it would be cool if I could set adjustable time quotas on user accounts, so that they would be…
singpolyma
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Monitoring Network Useage

I have a server (running Ubuntu, but I can put a BSD/Solaris or other distro on if that helps) running beween my LAN and my sattelite modem (basically acting as a router). I would like to track inbound/outbound Internet useage in both time and…
singpolyma
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sendmail command executes without error but not actually sending mails

I am trying to send emails from my ubuntu server using sendmail command. I ran command echo "Subject: Sendmail test" | sendmail -v , which ran without any errors but still I don't receive any emails. ... Connecting to [127.0.0.1] via…
Avik Aggarwal
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ClamAV can't open/parse

I installed clamAV on an EC2 instance running CentOS, i made the install and when I go to run 'sudo freshclam' i get ERROR: Can't open/parse the config file /usr/local/etc/freshclam.conf However if I try to navigate to that file it does not exist…
blau
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How to restrict user rights on Debian?

I have a production server, which runs an web application. Now I need to grant SSH access to a developer in order for him to work on the files of the application. He already has a chrooted sFTP access, but now circumstances require to expand this…
manifestor
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Serving multiple web apps in same IP different Ports with Apache2

I have multiple web project in the same VPS as below: /var/www/html/ │---webapp1/ │ │---public/ │ │ │---index.php │---webapp2/ │ │---public/ │ │ │---index.php │---index.html I want to serve the webapp1 under 95.87.154.170:81 and webapp2…
jAdex
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get a specific line from in linux using grep

Hello I am new to linux and grep and awk commands. I am trying to get the number value from this string variable and then store it in another variable. var1="Version must be incremented on update. Current version is: 532" var2=var1 | grep "?" What…
Alex
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Setting source ip address of exporter in rsyslog.conf

An appliance has 2 interfaces. Would like to export syslog information using a particular interface ip address. How to configure this in /etc/rsyslog.conf?
Kranthi
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Unknown RR type in bind zone file [CENTOS 7]

I am experimenting with Bind at the moment and setting up an pimary dns on Centos 7. The settings have been configured accordingly and adjusted to what i want. But i am recieving error upon start bind and named. The error i am encountering from…
epidrollic
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kickstart file /run/install/ks.cfg is missing centos

I am in a bit of trouble in regards to an kickstart installation and this is done via net install and is running on VMWARE sphere. All systems have as well been updated and upgraded to the latest kernel The image is gathered via an file server. But…
madamfiles
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Reference network file in command line with SSH protocol

I'm trying to reference a file in the command line, but I keep getting the 'No such file or directory' error. The system uses SSH for the protocol. Examples (that cause error): grep regex
Lance Roberts
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Why is it that during my replication (master-slave), it keeps inserting data, then deleting data, then inserting data?

I followed this tutorial for master-slave replication: http://www.howtoforge.com/mysql_master_master_replication Basically, this is what I did. Uninstalled mysql on both servers. Installed mysql on both servers. Loaded the data onto both…
Alex
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What could be eating up my entire hard drive space ? (650GB)

I only have a database , which is around 40G. I did have some problems with replication earlier....could it be some sort of log/files that are eating it up? How do I check why the space is taken up? I'm using Ubuntu, the latest version. I don't have…
Alex
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Why is my RAM (16G) being completely used up?

When I do "top", I only see that mysqld is using 70% of Memory. Nothing else. Why is it being used up?
Alex
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Elastic Search using a lot of memory despite low heap size

We have configured Elastic Search JVM options /etc/elasticsearch/jvm.options to use a fixed heap size of -Xms512m -Xmx512m This can be confirmed as working when checking the Elastic Search process: However you'll notice that it's still using 835M…
Gary Green
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