The table below looks at the statistics for CentOS skills in IT jobs advertised for the Hertfordshire region. Included is a guide to the salaries offered in IT jobs that have cited CentOS over the 3 months to 30 May 2016 with a comparison to the same period over the previous 2 years.

3 months to
30 May 2016
Same period 2015 Same period 2014
CentOS Linux
Rank 122 142 134
Rank change year-on-year
+20 -8
Permanent jobs citing CentOS 10 16 16
As % of all permanent IT jobs located in Hertfordshire 0.49% 0.70% 0.61%
As % of the Operating Systems category 2.09% 2.16% 2.14%
Number of salaries quoted 10 16 16
Median salary £50,000 £55,000 £53,000
Median salary % change year-on-year
-9.09% +3.77%
UK excluding London median salary £49,000 £40,000 £37,500
% change year-on-year
+22.50% +6.66%
CentOS
East of England

The following table is for comparison with the above and provides statistics for the entire Operating Systems category in permanent jobs advertised in the Hertfordshire region.

Operating Systems Category
Hertfordshire
Permanent IT job ads with a match in the
Operating Systems category
478 742 747
As % of all permanent IT jobs located in Hertfordshire 23.33% 32.50% 28.68%
Number of salaries quoted 384 540 620
Median salary £37,500 £37,500 £36,500
Median salary % change year-on-year
- +2.73%
90% offered a salary of more than £25,000 £25,000 £25,000
10% offered a salary of more than £60,000 £55,000 £55,000
UK excluding London median salary £37,500 £37,500 £36,000
% change year-on-year
- +4.16%

CentOS
Jobs Demand Trend in Hertfordshire

The demand trend of job ads across the Hertfordshire region citing CentOS as a proportion of all IT jobs with a match in the Operating Systems category.

CentOS Jobs Demand Trend in Hertfordshire

CentOS
Salary Trend in Hertfordshire

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

CentOS Salary Trend in Hertfordshire

CentOS
Salary Histogram in Hertfordshire

This chart provides a salary histogram for IT jobs citing CentOS across the Hertfordshire region over the 3 months to 30 May 2016.

CentOS Salary Histogram in Hertfordshire

CentOS
Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the Hertfordshire region over the 3 months to 30 May 2016. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location
(Click see detailed
statistics and trends)
Rank Change
on Same Period
Last Year
Matching
Permanent
IT Job Ads
Median Salary
Last 3 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
Hemel Hempstead - 5 £50,000 -
Royston - 2 £52,500 -
Watford +9 1 £60,000 +50.00%
Welwyn Garden City - 1 £47,500 -
Harpenden - 1 £38,500 -
CentOS
East of England

CentOS
Top 30 Related IT Skills in Hertfordshire

For the 6 months to 30 May 2016, IT jobs citing CentOS also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the Hertfordshire region with a requirement for CentOS.

1 19 (100.00%) Linux
2 11 (57.89%) SAN
2 11 (57.89%) Red Hat
3 9 (47.37%) VMware
4 8 (42.11%) Apache
4 8 (42.11%) Perl
4 8 (42.11%) Bash Shell
5 7 (36.84%) PHP
5 7 (36.84%) MySQL
5 7 (36.84%) Unix
5 7 (36.84%) TCP/IP
5 7 (36.84%) DNS
5 7 (36.84%) Firewall
5 7 (36.84%) LAMP
5 7 (36.84%) Load Balancing
6 6 (31.58%) VMware Infrastructure
6 6 (31.58%) NAS
7 5 (26.32%) nginx
7 5 (26.32%) Sendmail
7 5 (26.32%) Varnish
7 5 (26.32%) cPanel
7 5 (26.32%) iptables
7 5 (26.32%) LEMP Stack
7 5 (26.32%) IMAP
7 5 (26.32%) SSH
7 5 (26.32%) Nagios
7 5 (26.32%) SSL
7 5 (26.32%) SLA
7 5 (26.32%) POP3
7 5 (26.32%) SMTP

CentOS
Top Related IT Skills in Hertfordshire 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 8 (42.11%) Apache
2 5 (26.32%) nginx
3 4 (21.05%) Joomla!
3 4 (21.05%) Moodle
3 4 (21.05%) WordPress
4 2 (10.53%) Tomcat
5 1 (5.26%) OpenStack
Business Applications
1 4 (21.05%) Magento
Cloud Services
1 1 (5.26%) Amazon AWS
Communications & Networking
1 11 (57.89%) SAN
2 7 (36.84%) DNS
2 7 (36.84%) Firewall
2 7 (36.84%) TCP/IP
3 6 (31.58%) NAS
4 5 (26.32%) FTP
4 5 (26.32%) IMAP
4 5 (26.32%) POP3
4 5 (26.32%) SMTP
4 5 (26.32%) SSH
4 5 (26.32%) SSL
5 2 (10.53%) Wi-Fi
5 2 (10.53%) Wireless
Database & Business Intelligence
1 7 (36.84%) MySQL
Job Titles
1 15 (78.95%) Administrator
1 15 (78.95%) Linux Administrator
1 15 (78.95%) Linux Systems Administrator
2 14 (73.68%) Systems Administrator
3 5 (26.32%) Unix Administrator
3 5 (26.32%) Unix Linux Systems Administrator
3 5 (26.32%) Unix Systems Administrator
3 5 (26.32%) VMWare Administrator
4 4 (21.05%) Web Administrator
4 4 (21.05%) Web Hosting Administrator
5 3 (15.79%) IT Administrator
5 3 (15.79%) IT Systems Administrator
6 1 (5.26%) DevOps Administrator
6 1 (5.26%) Infrastructure Team Leader
6 1 (5.26%) IT Infrastructure Team Leader
6 1 (5.26%) Linux DevOps Administrator
6 1 (5.26%) Linux/Unix DevOps
6 1 (5.26%) Senior Linux Administrator
6 1 (5.26%) Senior Server Engineer
6 1 (5.26%) Senior Systems Administrator
Libraries, Frameworks & Software Standards
1 7 (36.84%) LAMP
2 5 (26.32%) LEMP Stack
3 4 (21.05%) Alternative PHP Cache
4 1 (5.26%) PHP-FPM
Miscellaneous
1 4 (21.05%) Clustering
1 4 (21.05%) Replication
2 1 (5.26%) Data Centre
Operating Systems
1 19 (100.00%) Linux
2 7 (36.84%) Unix
3 5 (26.32%) Windows
4 4 (21.05%) Ubuntu
5 3 (15.79%) Debian
5 3 (15.79%) Red Hat Enterprise Linux
6 2 (10.53%) Windows Server
7 1 (5.26%) Fedora
7 1 (5.26%) Solaris
7 1 (5.26%) SUSE
7 1 (5.26%) Windows Server 2008
7 1 (5.26%) Windows Server 2012
Processes & Methodologies
1 7 (36.84%) Load Balancing
2 4 (21.05%) Performance Tuning
2 4 (21.05%) Time Management
3 2 (10.53%) DevOps
3 2 (10.53%) Information Management
4 1 (5.26%) High Availability
4 1 (5.26%) ITIL
Programming Languages
1 8 (42.11%) Bash Shell
1 8 (42.11%) Perl
2 7 (36.84%) PHP
3 4 (21.05%) SQL
4 3 (15.79%) Python
5 1 (5.26%) PowerShell
5 1 (5.26%) VBScript
Qualifications
1 2 (10.53%) CCNP
1 2 (10.53%) Cisco Certification
2 1 (5.26%) CCIE
2 1 (5.26%) CCNA
Quality Assurance & Compliance
1 5 (26.32%) SLA
System Software
1 6 (31.58%) VMware Infrastructure
2 5 (26.32%) iptables
2 5 (26.32%) Sendmail
2 5 (26.32%) Varnish
3 4 (21.05%) Xen
4 2 (10.53%) Active Directory
4 2 (10.53%) vSphere
5 1 (5.26%) vCloud
Systems Management
1 5 (26.32%) cPanel
1 5 (26.32%) Nagios
2 4 (21.05%) Cacti
3 1 (5.26%) Ansible
3 1 (5.26%) HAProxy
3 1 (5.26%) Opscode Chef
3 1 (5.26%) Puppet
Vendors
1 11 (57.89%) Red Hat
2 9 (47.37%) VMware
3 4 (21.05%) IDERA
3 4 (21.05%) R1Soft
4 3 (15.79%) Sun
5 2 (10.53%) Aruba
5 2 (10.53%) CheckPoint
5 2 (10.53%) Cisco
5 2 (10.53%) F5
5 2 (10.53%) Juniper
6 1 (5.26%) 3PAR
6 1 (5.26%) Citrix
6 1 (5.26%) HP
6 1 (5.26%) Microsoft