The table below looks at the statistics for CentOS skills in IT jobs advertised for the Hertfordshire region. Included is a guide to the average salaries offered in IT jobs that have cited CentOS over the 3 months to 29 April 2016 with a comparison to the same period in the previous 2 years.

3 months to
29 Apr 2016
Same period 2015 Same period 2014
CentOS Linux
Rank 137 141 131
Rank change year-on-year
+4 -10
Permanent jobs citing CentOS 9 14 17
As % of all permanent IT jobs located in Hertfordshire 0.40% 0.61% 0.68%
As % of the Operating Systems category 1.58% 1.79% 2.23%
Number of salaries quoted 9 14 17
Average salary £47,500 £55,000 £53,000
Average salary % change year-on-year
-13.63% +3.77%
UK excluding London average salary £47,500 £40,000 £38,000
% change year-on-year
+18.75% +5.26%
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
569 783 762
As % of all permanent IT jobs located in Hertfordshire 25.17% 34.10% 30.46%
Number of salaries quoted 435 612 635
Average salary £33,000 £36,000 £35,000
Average salary % change year-on-year
-8.33% +2.85%
90% offered a salary of more than £23,000 £22,850 £23,000
10% offered a salary of more than £55,000 £50,000 £55,000
UK excluding London average salary £37,500 £37,500 £36,500
% change year-on-year
- +2.73%

CentOS
Jobs Demand Trend in Hertfordshire

This chart provides a 3-month moving total of permanent IT jobs citing CentOS across the Hertfordshire region as a proportion of the total demand within 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 29 April 2016.

CentOS Salary Histogram in Hertfordshire

CentOS
Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the average salaries quoted in IT jobs citing CentOS within the Hertfordshire region over the 3 months to 29 April 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
(Use links below to see detailed
statistics and historical trends)
Rank Change
on Same Period
Last Year
Matching
Permanent
IT Job Ads
Average Salary
Last 3 Months
Average Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
Hemel Hempstead +15 5 £50,000 +11.11% 1
Harpenden - 3 £37,500 -
Welwyn Garden City - 1 £47,500 -
CentOS
East of England

CentOS
Top 30 Related IT Skills in Hertfordshire

For the 6 months to 29 April 2016, IT jobs across the Hertfordshire region citing CentOS also mentioned the following IT skills in order of popularity. The figures indicate the number of jobs and their proportion against the total number of IT job ads sampled that cited CentOS.

1 16 (100.00%) Linux
2 11 (68.75%) SAN
3 9 (56.25%) Red Hat
4 8 (50.00%) VMware
5 7 (43.75%) Load Balancing
5 7 (43.75%) PHP
5 7 (43.75%) MySQL
5 7 (43.75%) TCP/IP
5 7 (43.75%) DNS
5 7 (43.75%) Unix
6 6 (37.50%) Apache
6 6 (37.50%) Perl
6 6 (37.50%) Firewall
6 6 (37.50%) LAMP
6 6 (37.50%) NAS
7 5 (31.25%) nginx
7 5 (31.25%) IMAP
7 5 (31.25%) Sendmail
7 5 (31.25%) Bash Shell
7 5 (31.25%) Varnish
7 5 (31.25%) cPanel
7 5 (31.25%) iptables
7 5 (31.25%) LEMP Stack
7 5 (31.25%) SSH
7 5 (31.25%) VMware Infrastructure
7 5 (31.25%) Nagios
7 5 (31.25%) POP3
7 5 (31.25%) SMTP
7 5 (31.25%) FTP
7 5 (31.25%) SSL

CentOS
Top Related IT Skills in Hertfordshire by Category

For the 6 months to 29 April 2016, IT jobs across the Hertfordshire region citing CentOS also mentioned the following IT skills grouped by category. The figures indicate the number of jobs and their proportion against the total number of IT job ads sampled that cited CentOS. Up to 20 skills are shown per category.

Application Platforms
1 6 (37.50%) Apache
2 5 (31.25%) nginx
3 4 (25.00%) Joomla!
3 4 (25.00%) Moodle
3 4 (25.00%) WordPress
Business Applications
1 4 (25.00%) Magento
Communications & Networking
1 11 (68.75%) SAN
2 7 (43.75%) DNS
2 7 (43.75%) TCP/IP
3 6 (37.50%) Firewall
3 6 (37.50%) NAS
4 5 (31.25%) FTP
4 5 (31.25%) IMAP
4 5 (31.25%) POP3
4 5 (31.25%) SMTP
4 5 (31.25%) SSH
4 5 (31.25%) SSL
5 2 (12.50%) Wi-Fi
5 2 (12.50%) Wireless
Database & Business Intelligence
1 7 (43.75%) MySQL
Job Titles
1 12 (75.00%) Administrator
1 12 (75.00%) Linux Administrator
1 12 (75.00%) Linux Systems Administrator
2 11 (68.75%) Systems Administrator
3 5 (31.25%) Unix Administrator
3 5 (31.25%) Unix Linux Systems Administrator
3 5 (31.25%) Unix Systems Administrator
3 5 (31.25%) VMWare Administrator
4 4 (25.00%) Web Administrator
4 4 (25.00%) Web Hosting Administrator
5 3 (18.75%) IT Administrator
5 3 (18.75%) IT Systems Administrator
6 1 (6.25%) Infrastructure Team Leader
6 1 (6.25%) IT Infrastructure Team Leader
6 1 (6.25%) Senior Linux Administrator
6 1 (6.25%) Senior Network Engineer
6 1 (6.25%) Senior Server Engineer
6 1 (6.25%) Senior Systems Administrator
6 1 (6.25%) Server Engineer
6 1 (6.25%) Team Leader
Libraries, Frameworks & Software Standards
1 6 (37.50%) LAMP
2 5 (31.25%) LEMP Stack
3 4 (25.00%) Alternative PHP Cache
4 1 (6.25%) PHP-FPM
Miscellaneous
1 4 (25.00%) Clustering
1 4 (25.00%) Replication
2 1 (6.25%) Data Centre
Operating Systems
1 16 (100.00%) Linux
2 7 (43.75%) Unix
3 3 (18.75%) Debian
3 3 (18.75%) Ubuntu
3 3 (18.75%) Windows
4 2 (12.50%) Windows Server
5 1 (6.25%) Fedora
5 1 (6.25%) Red Hat Enterprise Linux
5 1 (6.25%) Solaris
5 1 (6.25%) SUSE
5 1 (6.25%) Windows Server 2008
5 1 (6.25%) Windows Server 2012
Processes & Methodologies
1 7 (43.75%) Load Balancing
2 4 (25.00%) Performance Tuning
2 4 (25.00%) Time Management
3 2 (12.50%) Information Management
4 1 (6.25%) High Availability
4 1 (6.25%) ITIL
Programming Languages
1 7 (43.75%) PHP
2 6 (37.50%) Perl
3 5 (31.25%) Bash Shell
4 4 (25.00%) SQL
5 1 (6.25%) PowerShell
5 1 (6.25%) VBScript
Qualifications
1 2 (12.50%) CCNP
1 2 (12.50%) Cisco Certification
2 1 (6.25%) CCIE
2 1 (6.25%) CCNA
Quality Assurance & Compliance
1 5 (31.25%) SLA
System Software
1 5 (31.25%) iptables
1 5 (31.25%) Sendmail
1 5 (31.25%) Varnish
1 5 (31.25%) VMware Infrastructure
2 4 (25.00%) Xen
3 2 (12.50%) vSphere
4 1 (6.25%) Active Directory
4 1 (6.25%) vCloud
Systems Management
1 5 (31.25%) cPanel
1 5 (31.25%) Nagios
2 4 (25.00%) Cacti
3 1 (6.25%) HAProxy
Vendors
1 9 (56.25%) Red Hat
2 8 (50.00%) VMware
3 4 (25.00%) IDERA
3 4 (25.00%) R1Soft
4 3 (18.75%) Sun
5 2 (12.50%) Aruba
5 2 (12.50%) CheckPoint
5 2 (12.50%) Cisco
5 2 (12.50%) F5
5 2 (12.50%) Juniper
6 1 (6.25%) 3PAR
6 1 (6.25%) Citrix
6 1 (6.25%) HP
6 1 (6.25%) Microsoft