Period
to 21 May 2018

The following table provides summary statistics for permanent job vacancies with a requirement for CentOS skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited CentOS over the 6 months to 21 May 2018 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
21 May 2018
Same period 2017 Same period 2016
Rank 453 404 442
Rank change year-on-year -49 +38 +5
Permanent jobs citing CentOS 1,126 1,285 1,440
As % of all permanent IT jobs advertised in the UK 0.66% 0.76% 0.72%
As % of the Operating Systems category 2.79% 3.14% 2.76%
Number of salaries quoted 968 1,113 1,245
UK median annual salary £49,250 £50,000 £52,500
Median salary % change year-on-year -1.50% -4.76% +16.67%
10th Percentile £32,500 £32,500 £31,250
90th Percentile £78,750 £80,000 £75,000
UK excluding London median annual salary £45,000 £45,000 £46,000
% change year-on-year - -2.17% +13.58%

CentOS is in the Operating Systems category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies with a requirement for operating system skills.

All Operating Systems
UK
Permanent vacancies with a requirement for operating system skills 40,380 40,974 52,132
As % of all permanent IT jobs advertised in the UK 23.51% 24.27% 25.93%
Number of salaries quoted 32,719 34,331 44,096
UK median annual salary £46,000 £45,000 £43,000
Median salary % change year-on-year +2.22% +4.65% +1.18%
10th Percentile £25,500 £25,000 £24,750
90th Percentile £76,250 £73,750 £71,250
UK excluding London median annual salary £40,000 £40,000 £40,000

CentOS
Job Vacancy Trend

Job postings citing CentOS as a percentage of all IT jobs advertised.

Job vacancy trend for CentOS in the UK

CentOS
Salary Trend

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing CentOS.

Salary trend for CentOS in the UK

CentOS
Salary Histogram

The salary distribution of IT jobs citing CentOS over the 6 months to 21 May 2018.

Salary histogram for CentOS in the UK

CentOS
Top 16 Job Locations

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the UK over the 6 months to 21 May 2018. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Permanent
IT Job Ads
Median Salary
Past 6 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
England -44 1,067 £50,000 - 204
UK excluding London -47 624 £45,000 - 145
London -40 487 £55,000 -8.33% 80
South East -99 197 £47,500 -5.00% 40
North of England +25 142 £40,000 - 31
South West +16 117 £45,000 +16.13% 25
North West +10 83 £37,500 -16.67% 19
Midlands +4 73 £45,000 +23.29% 14
Yorkshire +41 55 £45,000 +12.50% 8
East of England -4 54 £55,000 +22.22% 14
West Midlands 0 51 £40,000 - 8
Wales +17 22 £40,000 - 13
East Midlands +3 22 £45,000 +46.34% 6
Scotland -26 22 £42,500 +34.92% 8
North East -22 4 £40,000 +8.11% 4
Northern Ireland - 2 £40,000 -

For the 6 months to 21 May 2018, IT jobs citing CentOS also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent job ads with a requirement for CentOS.

1 1,126 (100.00%) Linux
2 638 (56.66%) Red Hat
3 489 (43.43%) Python
4 473 (42.01%) DevOps
5 440 (39.08%) Red Hat Enterprise Linux
6 416 (36.94%) Amazon AWS
7 401 (35.61%) Puppet
8 364 (32.33%) Windows
9 341 (30.28%) Ansible
10 334 (29.66%) Bash Shell
10 334 (29.66%) MySQL
11 307 (27.26%) Ubuntu
12 299 (26.55%) VMware
13 263 (23.36%) Apache
14 252 (22.38%) Docker
15 245 (21.76%) Git (software)
16 242 (21.49%) Agile Software Development
17 239 (21.23%) Configuration Management
18 235 (20.87%) Opscode Chef
19 234 (20.78%) Jenkins
20 216 (19.18%) Debian
21 214 (19.01%) Perl
22 210 (18.65%) Java
23 201 (17.85%) PHP
24 200 (17.76%) Firewall
25 193 (17.14%) VMware Infrastructure
26 190 (16.87%) Microsoft Azure
27 166 (14.74%) Nagios
28 162 (14.39%) LAMP
29 160 (14.21%) Windows Server

CentOS
Co-occurring IT Skills by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Application Platforms
1 263 (23.36%) Apache
2 121 (10.75%) Tomcat
3 96 (8.53%) nginx
4 88 (7.82%) Confluence
5 63 (5.60%) OpenStack
6 58 (5.15%) Elasticsearch
7 52 (4.62%) IIS
8 28 (2.49%) WordPress
9 27 (2.40%) JBoss
10 26 (2.31%) MS Exchange
11 24 (2.13%) WebSphere
12 18 (1.60%) SharePoint
13 16 (1.42%) Exchange Server 2013
13 16 (1.42%) WebLogic
14 15 (1.33%) Drupal
15 14 (1.24%) Moodle
16 12 (1.07%) Apache Spark
17 10 (0.89%) Apache Solr
17 10 (0.89%) Exchange Server 2010
18 9 (0.80%) CMS
Applications
1 14 (1.24%) Microsoft Office
2 6 (0.53%) Microsoft Excel
2 6 (0.53%) Spreadsheet
Business Applications
1 18 (1.60%) MetaTrader
2 15 (1.33%) Documaker
3 13 (1.15%) Magento
4 8 (0.71%) Rolfe and Nolan
5 5 (0.44%) SAP Hybris
6 4 (0.36%) Remedy ITSM
7 3 (0.27%) Payment Gateway
8 1 (0.089%) Dynamics CRM
8 1 (0.089%) Dynamics NAV
Cloud Services
1 416 (36.94%) Amazon AWS
2 190 (16.87%) Microsoft Azure
3 110 (9.77%) Amazon EC2
4 82 (7.28%) Amazon S3
5 80 (7.10%) AWS CloudFormation
6 71 (6.31%) Amazon ELB
7 59 (5.24%) Google Cloud Platform
7 59 (5.24%) Route 53
8 58 (5.15%) GitHub
9 54 (4.80%) Virtual Private Cloud
10 53 (4.71%) SaaS
11 51 (4.53%) IaaS
12 44 (3.91%) Amazon CloudWatch
13 42 (3.73%) Amazon ElastiCache
14 38 (3.37%) AWS Lambda
15 37 (3.29%) Serverless
16 36 (3.20%) Cloud Computing
17 34 (3.02%) Office 365
18 29 (2.58%) PaaS
19 19 (1.69%) CloudFront
Communications & Networking
1 200 (17.76%) Firewall
2 155 (13.77%) DNS
3 136 (12.08%) TCP/IP
4 80 (7.10%) SAN
5 77 (6.84%) HTTP
6 68 (6.04%) DHCP
7 66 (5.86%) VPN
8 54 (4.80%) Cisco ASA
9 53 (4.71%) WAN
10 51 (4.53%) Internet
11 45 (4.00%) LAN
12 44 (3.91%) SSH
13 43 (3.82%) SSL
14 40 (3.55%) SNMP
15 36 (3.20%) Network Security
16 32 (2.84%) IPsec
17 28 (2.49%) NAS
17 28 (2.49%) NetScaler
18 27 (2.40%) SMTP
19 26 (2.31%) VoIP
Database & Business Intelligence
1 334 (29.66%) MySQL
2 141 (12.52%) SQL Server
3 107 (9.50%) MongoDB
3 107 (9.50%) PostgreSQL
4 92 (8.17%) Amazon RDS
5 81 (7.19%) NoSQL
5 81 (7.19%) Redis
6 44 (3.91%) Big Data
7 42 (3.73%) Apache Cassandra
8 37 (3.29%) Hadoop
9 28 (2.49%) MariaDB
9 28 (2.49%) Relational Database
10 23 (2.04%) Oracle Database
11 21 (1.87%) SQL Server 2012
12 13 (1.15%) Amazon Aurora
12 13 (1.15%) Blockchain
13 12 (1.07%) Amazon DynamoDB
13 12 (1.07%) Impala
13 12 (1.07%) Sqoop
14 9 (0.80%) OLTP
Development Applications
1 245 (21.76%) Git (software)
2 234 (20.78%) Jenkins
3 109 (9.68%) JIRA
4 96 (8.53%) Atlassian Bamboo
5 75 (6.66%) TeamCity
6 65 (5.77%) Subversion
7 63 (5.60%) Vagrant
8 52 (4.62%) Maven
9 44 (3.91%) Eclipse
10 33 (2.93%) JUnit
11 32 (2.84%) Bitbucket
12 30 (2.66%) Sonatype Nexus
13 29 (2.58%) Octopus Deploy
14 25 (2.22%) Selenium
15 23 (2.04%) Ant
16 22 (1.95%) Team Foundation Server
17 20 (1.78%) IntelliJ
17 20 (1.78%) Visual Studio
18 18 (1.60%) Fiddler
18 18 (1.60%) ReSharper
General
1 138 (12.26%) Finance
2 50 (4.44%) Telecoms
3 35 (3.11%) Games
4 25 (2.22%) Marketing
5 23 (2.04%) Banking
6 21 (1.87%) Retail
7 18 (1.60%) Billing
8 15 (1.33%) Back Office
9 12 (1.07%) Advertising
10 9 (0.80%) Law
11 8 (0.71%) Legal
12 6 (0.53%) Financial Institution
12 6 (0.53%) Pharmaceutical
13 4 (0.36%) Retail Banking
14 2 (0.18%) Electronics
14 2 (0.18%) Online Betting
15 1 (0.089%) Front Office
15 1 (0.089%) Manufacturing
15 1 (0.089%) Military
15 1 (0.089%) Publishing
Job Titles
1 278 (24.69%) DevOps Engineer
2 198 (17.58%) Administrator
3 193 (17.14%) Linux Engineer
4 172 (15.28%) Systems Administrator
5 168 (14.92%) Linux Administrator
6 152 (13.50%) Linux Systems Administrator
7 123 (10.92%) Developer
8 103 (9.15%) Systems Engineer
9 95 (8.44%) Linux/Unix DevOps
10 71 (6.31%) Linux DevOps Engineer
11 70 (6.22%) Senior DevOps
11 70 (6.22%) Senior DevOps Engineer
12 67 (5.95%) Infrastructure Engineer
13 62 (5.51%) AWS Engineer
14 58 (5.15%) Linux Systems Engineer
15 55 (4.88%) Cloud Engineer
16 51 (4.53%) PHP Developer
17 44 (3.91%) AWS DevOps
18 43 (3.82%) Analyst
19 35 (3.11%) AWS DevOps Engineer
Libraries, Frameworks & Software Standards
1 162 (14.39%) LAMP
2 138 (12.26%) Web Services
3 67 (5.95%) HTML
4 65 (5.77%) CSS
5 62 (5.51%) RabbitMQ
6 59 (5.24%) LEMP Stack
7 52 (4.62%) Elastic Stack
7 52 (4.62%) XML
8 43 (3.82%) JSON
9 39 (3.46%) REST
9 39 (3.46%) SOAP
9 39 (3.46%) Spring
10 38 (3.37%) Kafka
11 37 (3.29%) Node.js
11 37 (3.29%) RESTful
12 35 (3.11%) ActiveMQ
13 33 (2.93%) LDAP
13 33 (2.93%) Middleware
14 30 (2.66%) .NET
14 30 (2.66%) jQuery
Miscellaneous
1 78 (6.93%) Computer Science
2 74 (6.57%) Linux Command Line
3 66 (5.86%) Analytical Skills
4 64 (5.68%) Data Centre
5 56 (4.97%) Public Cloud
6 40 (3.55%) Private Cloud
6 40 (3.55%) Self-Motivation
7 30 (2.66%) Replication
8 26 (2.31%) Fintech
9 24 (2.13%) Clustering
10 22 (1.95%) Management Information System
11 19 (1.69%) Hedge funds
12 13 (1.15%) BBC
12 13 (1.15%) Greenfield Project
12 13 (1.15%) Robotics
13 12 (1.07%) Wiki
14 11 (0.98%) Eurex
15 10 (0.89%) Bitcoin
15 10 (0.89%) Data Structures
15 10 (0.89%) Mobile App
Operating Systems
1 1,126 (100.00%) Linux
2 440 (39.08%) Red Hat Enterprise Linux
3 364 (32.33%) Windows
4 307 (27.26%) Ubuntu
5 216 (19.18%) Debian
6 160 (14.21%) Windows Server
7 132 (11.72%) Unix
8 109 (9.68%) Windows Server 2012
9 90 (7.99%) Windows Server 2008
10 60 (5.33%) SUSE
11 44 (3.91%) Fedora
12 43 (3.82%) Solaris
13 33 (2.93%) Windows 10
14 27 (2.40%) Amazon Linux
15 26 (2.31%) AIX
16 20 (1.78%) Windows Server 2003
17 16 (1.42%) Mac OS X
18 15 (1.33%) Android
18 15 (1.33%) DC/OS
19 14 (1.24%) Mac OS
Processes & Methodologies
1 473 (42.01%) DevOps
2 242 (21.49%) Agile Software Development
3 239 (21.23%) Configuration Management
4 151 (13.41%) Open Source
5 132 (11.72%) High Availability
6 112 (9.95%) ITIL
7 110 (9.77%) Problem-Solving
8 82 (7.28%) Continuous Integration
9 73 (6.48%) Scrum
10 65 (5.77%) Migration
11 62 (5.51%) Disaster Recovery
11 62 (5.51%) E-Commerce
11 62 (5.51%) Load Balancing
12 61 (5.42%) Software Engineering
13 58 (5.15%) MVC
14 56 (4.97%) Deployment Automation
15 48 (4.26%) Mentoring
16 45 (4.00%) SDLC
17 44 (3.91%) Change Management
18 41 (3.64%) Project Management
Programming Languages
1 489 (43.43%) Python
2 334 (29.66%) Bash Shell
3 214 (19.01%) Perl
4 210 (18.65%) Java
5 201 (17.85%) PHP
6 153 (13.59%) JavaScript
7 151 (13.41%) SQL
8 137 (12.17%) Ruby
9 98 (8.70%) PowerShell
10 96 (8.53%) Shell Script
11 73 (6.48%) C++
12 52 (4.62%) C
13 37 (3.29%) C#
14 26 (2.31%) Go
15 17 (1.51%) Korn
16 15 (1.33%) T-SQL
17 13 (1.15%) Bourne shell
18 12 (1.07%) Lua
19 11 (0.98%) Groovy
20 9 (0.80%) PHP 5
Qualifications
1 98 (8.70%) Degree
2 83 (7.37%) Security Cleared
3 53 (4.71%) Cisco Certification
4 43 (3.82%) DV Cleared
4 43 (3.82%) SC Cleared
5 42 (3.73%) CCNA
6 30 (2.66%) Microsoft Certification
7 29 (2.58%) Computer Science Degree
8 28 (2.49%) AWS Certification
9 24 (2.13%) RHCE
10 21 (1.87%) RHCA
11 18 (1.60%) VMware Certified Professional (VCP)
12 17 (1.51%) RHCSA
13 16 (1.42%) Master's Degree
14 12 (1.07%) CCNP
15 10 (0.89%) CISSP
15 10 (0.89%) MCSE
16 9 (0.80%) Linux+ Certification
16 9 (0.80%) LPIC
17 8 (0.71%) Numerate Degree
Quality Assurance & Compliance
1 58 (5.15%) QA
2 28 (2.49%) ISO/IEC 27001
3 24 (2.13%) PCI DSS
4 21 (1.87%) GCP
5 16 (1.42%) SLA
6 2 (0.18%) GDPR
7 1 (0.089%) Cyber Essentials
System Software
1 252 (22.38%) Docker
2 193 (17.14%) VMware Infrastructure
3 130 (11.55%) Active Directory
4 84 (7.46%) Hyper-V
5 52 (4.62%) iptables
6 45 (4.00%) Virtual Machines
7 38 (3.37%) KVM
8 35 (3.11%) VirtualBox
9 30 (2.66%) Samba
10 25 (2.22%) VMware ESXi
11 22 (1.95%) NFS
11 22 (1.95%) vSphere
12 18 (1.60%) Squid
12 18 (1.60%) XenServer
13 15 (1.33%) Postfix
14 13 (1.15%) Apache Flume
15 12 (1.07%) Ceph
15 12 (1.07%) Kamailio
15 12 (1.07%) XenApp
16 11 (0.98%) QEMU
Systems Management
1 401 (35.61%) Puppet
2 341 (30.28%) Ansible
3 235 (20.87%) Opscode Chef
4 166 (14.74%) Nagios
5 128 (11.37%) Kubernetes
6 102 (9.06%) Terraform
7 50 (4.44%) ZABBIX
8 42 (3.73%) Docker Swarm
9 40 (3.55%) logstash
10 37 (3.29%) Salt
11 34 (3.02%) Packer
12 30 (2.66%) Rancher
13 28 (2.49%) Kibana
14 25 (2.22%) HAProxy
15 23 (2.04%) Grafana
16 22 (1.95%) SELinux
17 18 (1.60%) Perfmon
18 17 (1.51%) Cacti
18 17 (1.51%) Red Hat Satellite
19 16 (1.42%) vRealize
Vendors
1 638 (56.66%) Red Hat
2 299 (26.55%) VMware
3 134 (11.90%) Cisco
4 133 (11.81%) Oracle
5 130 (11.55%) Microsoft
6 84 (7.46%) Google
7 71 (6.31%) Splunk
8 60 (5.33%) HP
9 49 (4.35%) New Relic
10 47 (4.17%) SolarWinds
11 41 (3.64%) SaltStack
12 39 (3.46%) IBM
13 33 (2.93%) Atlassian
14 31 (2.75%) Citrix
14 31 (2.75%) Juniper
15 24 (2.13%) Dell
16 23 (2.04%) NetApp
16 23 (2.04%) Sun
17 21 (1.87%) hybris
17 21 (1.87%) TIBCO