VMware Tools

If your VPS runs on ESXi then you would most likely have VMware tools installed. To determine which version you have you would run the following command:

vmware-toolbox-cmd -v

This will return the VMware tools version, once you have the version of the VMware tools you will be able to determine the ESXi server version.

https://packages.vmware.com/tools/versions

# VMware version-mapping file.
#
# This file provides a one-to-one mapping between VMware Tools for
# ESX/ESXi version-number codes, and paths to OSP repositories suitable
# for that Tools version.
#
# The ESXi server mapping is only to show that the particular version of
# Tools ships with that particular ESXi server build number, but the Tools
# can work with a greater range of ESXi versions.
#
# Column 1: Tools version on NGC/VI Client
# Column 2: ESXi server version
# Column 3: Tools version on guest Setup/About page
# Column 4: ESXi server build number
#
9441        ../../unsupported/tools/esx/6.0        9.7.1         1636483
9541        esx/6.0u1                              9.10.5        3029758
9537        esx/6.0p01                             9.10.1        2809209
9536        esx/6.0                                9.10.0        2494585
9359        esx/5.5u3                              9.4.15        3029944
9356        esx/5.5p05                             9.4.12        2668677
9355        esx/5.5ep07                            9.4.11        2638301
9355        esx/5.5ep06                            9.4.11        2456374
9355        esx/5.5p04                             9.4.11        2403361
9354        esx/5.5ep05                            9.4.10        2143827 
9354        esx/5.5p03                             9.4.10        2143827 
9354        esx/5.5u2                              9.4.10        2068190
9350        esx/5.5p02                             9.4.6         1892794
9349        esx/5.5ep04                            9.4.5         1881737
9349        esx/5.5ep03                            9.4.5         1746974
9349        esx/5.5ep02                            9.4.5         1750340
9349        esx/5.5u1                              9.4.5         1623387
9344        esx/5.5p01                             9.4.0         1474528
9344        esx/5.5                                9.4.0         1331820
9232        esx/5.1p08                             9.0.16        3070626
9231        esx/5.1p07                             9.0.15     	 2583090
9231        esx/5.1u3                              9.0.15        2323236
9229        esx/5.1p06                             9.0.13        2126665
9228        esx/5.1p05                             9.0.12        1897911
9227        esx/5.1ep05                            9.0.11        1900470
9227        esx/5.1p04                             9.0.11        1743533
9226        esx/5.1ep04                            9.0.10        1612806
9226        esx/5.1u2                              9.0.10        1483097
9221        esx/5.1p03                             9.0.5         1312873
9221        esx/5.1p02                             9.0.5         1157734
9221        esx/5.1ep03                            9.0.5         1117900
9221        esx/5.1u1                              9.0.5         1065491
9217        esx/5.1ep02                            9.0.1         1021289
9217        esx/5.1p01                             9.0.1         914609
9216        esx/5.1                                9.0.0         799733
8400        esx/5.0p12                             8.6.16        3086167
8399        esx/5.0p11                             8.6.15        2509828
8398        esx/5.0p10                             8.6.14        2312428
8398        esx/5.0p09                             8.6.14        1976090
8397        esx/5.0ep06                            8.6.13        1918656
8397        esx/5.0p08                             8.6.13        1851670
8396        esx/5.0p07                             8.6.12        1489271
8395        esx/5.0u3                              8.6.11        1311175
8395        esx/5.0p06                             8.6.11        1254542
8395        esx/5.0ep05                            8.6.11        1117897
8395        esx/5.0p05                             8.6.11        1024429
8394        esx/5.0u2                              8.6.10        914586
8397        esx/5.0p08                             8.6.13        1739451
8389        esx/5.0p04                             8.6.5         821926 
8389        esx/5.0p03                             8.6.5         768111
8389        esx/5.0u1                              8.6.5         623860
8384        esx/5.0p02                             8.6.0         515841
8384        esx/5.0p01                             8.6.0         474610
8384        esx/5.0                                8.6.0         469512
8307        esx/4.1p11                             8.3.19
8307        esx/4.1p10                             8.3.19
8307        esx/4.1p09                             8.3.19
8307        esx/4.1p08                             8.3.19
8306        esx/4.1p07                             8.3.18
8305        esx/4.1p06                             8.3.17
8305        esx/4.1u3                              8.3.17
8300        esx/4.1p05                             8.3.12
8300        esx/4.1p04                             8.3.12
8300        esx/4.1u2                              8.3.12
8295        esx/4.1p03                             8.3.7
8295        esx/4.1u1                              8.3.7
8290        esx/4.1                                8.3.2
8199        esx/4.0p15                             8.0.7
8199        esx/4.0p14                             8.0.7
8198        esx/4.0p13                             8.0.6
8197        esx/4.0ep09                            8.0.5
8196        esx/4.0p12                             8.0.4
8196        esx/4.0p11                             8.0.4
8196        esx/4.0u4                              8.0.4
8196        esx/4.0p10                             8.0.4
8196        esx/4.0u3                              8.0.4
8195        esx/4.0u2                              8.0.3
8194        esx/4.0u1                              8.0.2
8192        esx/4.0                                8.0.0
7304        esx/3.5p27                             7.4.8
7304        esx/3.5p25                             7.4.8
7304        esx/3.5p24                             7.4.8
7304        esx/3.5u5                              7.4.8
7303        esx/3.5u4                              7.4.7
7302        esx/3.5u3                              7.4.6
7302        esx/3.5u2                              7.4.6