Hello,
I have running boinc for ages, but something has become corrupted.
I installed the boinc from the Linux-mageia repo.
Now it does not seem to connect to the server. The data is all there , but gets erroe messages.

user1@endor BOINC]$ ./boinc --show_projects 
./boinc: /lib64/libssl.so.1.0.0: no version information available (required by ./boinc)
./boinc: /lib64/libcurl.so.4: no version information available (required by ./boinc)
./boinc: /lib64/libcrypto.so.1.0.0: no version information available (required by ./boinc)
23-Aug-2017 15:18:25 [---] cc_config.xml not found - using defaults
23-Aug-2017 15:18:25 [---] Starting BOINC client version 7.2.42 for x86_64-pc-linux-gnu
23-Aug-2017 15:18:25 [---] log flags: file_xfer, sched_ops, task
23-Aug-2017 15:18:25 [---] Libraries: libcurl/7.54.1 OpenSSL/1.0.2l zlib/1.2.11 libssh2/1.7.0 nghttp2/1.9.2
23-Aug-2017 15:18:25 [---] Data directory: /home/user1/BOINC
boinc: /lib64/libssl.so.1.0.0: no version information available (required by boinc)
boinc: /lib64/libcurl.so.4: no version information available (required by boinc)
boinc: /lib64/libcrypto.so.1.0.0: no version information available (required by boinc)
23-Aug-2017 15:18:25 [---] No usable GPUs found
23-Aug-2017 15:18:25 [---] Host name: endor
23-Aug-2017 15:18:25 [---] Processor: 8 GenuineIntel Intel(R) Core(TM) i7-4820K CPU @ 3.70GHz [Family 6 Model 62 Stepping 4]
23-Aug-2017 15:18:25 [---] Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm epb tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt dtherm ida arat pln pts
23-Aug-2017 15:18:25 [---] OS: Linux: 4.9.43-desktop-1.mga6
23-Aug-2017 15:18:25 [---] Memory: 23.47 GB physical, 8.03 GB virtual
23-Aug-2017 15:18:25 [---] Disk: 1.79 TB total, 1.25 TB free
23-Aug-2017 15:18:25 [---] Local time is UTC +10 hours
projects:
23-Aug-2017 15:18:25 [---] URL: http://setiathome.berkeley.edu/ name: SETI@home
23-Aug-2017 15:18:25 [---] URL: http://boinc.bakerlab.org/rosetta/ name: Rosetta@home

The BOINC from the distro's repository is usually installed as a package and built with the libraries that are used in that distro. The version you have is apparently the Berkeley installer, since it's installed in your home directory instead of the etc/boinc-client and /var/lib/boinc-client/ directories, and it doesn't know most of the libraries needed.

Of course the one thing you do need to do is make sure that the required libraries are installed on your system.
You can find a list of the required libraries here: https://www.rpmfind.net/linux/RPM/mageia/6/i586/media/core/release/boinc-client-7.2.42-10.mga6.i586.html

You can also check the binaries which libraries they require and if these are installed on your system:

ldd boinc-client
ldd boinccmd
ldd boinc-manager

That's el dee dee, https://linux.die.net/man/1/ldd

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