A
StartingLinux. From newcomer to professionalDenis Kolisnichenko, BHV-Peterburg, 2016, ISBN: 978-5-9775-3700-1Official documentation:Slackware: http://www.slackbook.org/ RedHat/Centos: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7-Beta/html/System_Administrators_Guide/index.html - in the middle.
2016, contains the best management guided.SuSE: https://www.suse.com/documentation/sles-12/book_sle_admin/data/book_sle_admin.html Ubuntu: http://help.ubuntu.ru/wiki/%D1%80%D1%83%D0%BA%D0%BE%D0%B2%D0%BE%D0%B4%D1%81%D1%82%D0%B2%D0%B0/ubuntubook https://rads.stackoverflow.com/amzn/click/078214425X Rodrick W.
Smith, 2005 http://www.tldp.org/LDP/abs/abs-guide.pdf AverageLinux Kernel Development (3rd Edition)Robert Love, Addison-Wesley Professional, 2010, ISBN: 978-0-6723-2946-3Russian translation: Linux core. Description of the development processRobert Love, Williams, 2014, ISBN: 978-5-8459-1944-1How Linux Works: What Every Superuser Should Know -Brian Word Russian translation: http://www.ozon.ru/context/detail/id/34792459/ - Brian Ward.The book of Postfix : state-of-the-art message transport - Ralf
Hildebrandt and Patrick Koetter Russian translation: http://www.ozon.ru/context/detail/id/3925535/ A very cool collection of linux prescriptions and a little powershell. RTFM
(Red Team Field Manual)Advanced levelComputer Networks 5th Edition Aandrew Tanenbaum, David Wetherall https://www.ozon.ru/context/detail/id/7309924/ Provides detailed information on the UNIXOS network, OSI levels, network security. Also http://www.e-reading.club/bookreader.php/1039398/Tanenbaum_-_Kompyuternye_seti._5-e_izdanie.html You can read it. Linux for installation systemsMastering Embedded Linux Programming: Harness the Power of Linux To Create Versatile and Robust Embedded SolutionsChris Simmonds, Packt Publishing Ltd., 2015, ISBN: 978-1-7843-9902-3Russian translation: Installation systems based on Linux. Chris Simmonds, DMK Press, 2017, ISBN: 978-5-97060-483-0Online courses:Introduction to linux
https://www.edx.org/course/introduction-linux-linuxfoundationx-lfs101x-0 Payable, but very good, Russian-language course for primary level
http://www.specialist.ru/course/yun1-b Russian-speaking course on linux
https://stepik.org/course/%D0%92%D0%B2%D0%B5%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5-%D0%B2-Linux-73/