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1500 questions
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10 answers

How do I check the build status of a Jenkins build from the command line?

How do I check the Jenkins build status without switching to the browser? If required, I can create a script using the JSON API, but I was wondering if there is already something like this built in.
Catskul
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54
votes
14 answers

Templating with Linux in a Shell Script?

What I want to acomplish is: Having a config file as template, with variables like $version $path (for example apache config) Having a shell script that "fills in" the variables of the template and writes the generated file to disk. Is this…
Markus
  • 877
54
votes
2 answers

How can I increase the value of somaxconn?

I can check its value by cat /proc/sys/net/core/somaxconn, is it OK if I change it simply by echo 1024 > /proc/sys/net/core/somaxconn?
linux_user
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54
votes
5 answers

Need to add a "Wait" command to a Powershell script

Here is my current code: Write-output “ENTER THE FOLLOWING DETAILS - When Creating Multiple New Accounts Go to EMC hit F5(refresh) and make sure previous new account is listed before proceeding to the next one” $DName = Read-Host…
Paul Masek
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54
votes
8 answers

How to VNC into an existing X session?

Would like to be able to connect to an existing X display, so can access my work environment and everything I left open from home. I vaguely remember something about using x11vnc in the past. But the package does not exists for Fedora 11, so I am…
grom
  • 819
54
votes
8 answers

How to grep ps output with headers

How can I grep the PS output with the headers in place? These two process make up an app running on my server.... root 17123 16727 0 16:25 pts/6 00:00:00 grep GMC root 32017 1 83 May03 ? 6-22:01:17…
Ben
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54
votes
2 answers

Why do I have to edit /etc/sudoers with visudo?

I've noticed that the sudoers file and cron config files act in a special way compared to other config files on Linux. They need to be edited with a special wrapper rather than any text editor. Why is this?
Brian Lyttle
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54
votes
24 answers

Which websites should a system administrator read?

I try to religiously follow planet sysadmin as well as IBM developerworks. Which ones do you read and advise to other system administrators?
tomdeb
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54
votes
3 answers

Unix socket vs TCP/IP host:port

Could someone please describe to me the pros and cons of using a Unix socket file vs a tcp/ip localhost:port when setting up services on a server (Ubuntu, FWIW)? In this particular instance it's for a Python WSGI server (uWSGI) but I'm just…
Ludo
  • 1,099
54
votes
5 answers

How exactly & specifically does layer 3 LACP destination address hashing work?

Based on an earlier question over a year ago (Multiplexed 1 Gbps Ethernet?), I went off and setup a new rack with a new ISP with LACP links all over the place. We need this because we have individual servers (one application, one IP) serving up…
Stu Thompson
  • 3,379
54
votes
8 answers

How is fire spread in server rooms and datacenters?

Every now and then I read that a severe fire has happened in some datacenter, lots of equipment has been damaged and customers have gone offline. Now I wonder what is there to support and spread fire? I mean walls in a server room usually have…
sharptooth
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54
votes
6 answers

how can I schedule a reboot in Linux?

I'm new in Linux and I want to schedule a reboot at midnight. How should I do it? Edits: I'm sorry I didn't put the complete details. I want a reboot every 3rd Saturday of the month at 23:30. I don't know what's wrong but I cannot find crontab.…
klauriens
  • 561
54
votes
7 answers

How can I find the LDAP server in the DNS on Windows?

For Linux, this command should return the DNS record for the LDAP server host -t srv _ldap._tcp.DOMAINNAME (found at Authenticating from Java (Linux) to Active Directory using LDAP WITHOUT servername) How could I get the same on the Windows command…
mjn
  • 943
54
votes
6 answers

Stop ssh client from offering all the public keys it can find?

Like most sysadmins I use openssh all the time. I have about a dozen ssh keys, I like to have a different ssh key for each host. However this causes a problem when I am connecting to a host for the first time, and all I have is a password. I want to…
Amandasaurus
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54
votes
4 answers

How to check cron logs in Ubuntu

I went to /var/log/cron but this file is empty. How to check if crontab is enabled or is running properly or not in ubuntu thanks
John
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