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unix security wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 design concepts toggle design concepts subsection 1 1 permissions 1 2 user groups 1 3 root access 2 user and administrative techniques 3 passwords 4 viruses and virus scanners 5 see also 6 references toggle references subsection 6 1 general toggle the table of contents unix security 3 languages čeština slovenčina українська edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia operating system security technologies this article has multiple issues please help improve it or discuss these issues on the talk page learn how and when to remove these messages this article relies on a single source please help improve this article by adding citations to reliable sources unsourced material may be challenged and removed find sources unix security news newspapers books scholar jstor april 2024 learn how and when to remove this message this article includes a list of general references but lacks sufficient corresponding inline citations please help improve this article by introducing more precise citations april 2024 learn how and when to remove this message learn how and when to remove this message unix security refers to the means of securing a unix or unix like operating system design concepts edit permissions edit main article file system permissions a core security feature in these systems is the file system permissions all files in a typical unix filesystem have permissions set enabling different access to a file unix permissions permit different users access to a file with different privileges e g reading writing execution like users different user groups have different permissions on a file citation needed user groups edit many unix implementations add an additional layer of security by requiring that a user be a member of the wheel user privileges group in order to access the su command 1 obsolete source root access edit sudo command on ubuntu to temporarily assume root privileges most unix and unix like systems have an account or user group which enables a user to exact complete control over the system often known as a root account if access to this account is gained by an unwanted user this results in a complete breach of the system a root account however is necessary for administrative purposes and for the above security reasons the root account is seldom used for day to day purposes the sudo program is more commonly used so usage of the root account can be more closely monitored citation needed user and administrative techniques edit passwords edit on many unix systems user and password information if stored locally can be found in the etc passwd and etc shadow file pair citation needed viruses and virus scanners edit there are viruses and worms that target unix like operating systems in fact the first computer worm the morris worm targeted unix systems there are virus scanners for unix like systems from multiple vendors see also edit list of unix systems references edit levi bozidar 2002 unix administration a comprehensive sourcebook for effective systems and network management crc press p 207 isbn 0 8493 1351 1 general edit practical unix and internet security simson garfinkel and gene spafford o reilly associates 2003 v t e unix and unix like operating systems and compatibility layers architecture filesystem history philosophy security shell operating systems bsd 386bsd freebsd netbsd openbsd dragonfly bsd darwin macos ios audioos ipados tvos watchos bridgeos dynix nextstep sunos ultrix linux android arch chromeos debian fedora gentoo red hat slackware suse ubuntu other distributions system v a ux aix hp ux irix openserver solaris opensolaris illumos tru64 unix unixware other coherent domain os gnu hurd lynxos minix mos osf 1 qnx blackberry 10 research unix serenityos xenix more compatibility layers cygwin darling eunice gnv interix machten microsoft posix subsystem mks toolkit pase p i p s pws vse af unix system services userland technologies windows services for unix windows subsystem for linux italics indicate discontinued systems category commons retrieved from https en wikipedia org w index php title unix_security oldid 1371960050 categories operating system security system administration unix linux administration linux security software hidden categories articles with short description short description is different from wikidata articles needing additional references from april 2024 all articles needing additional references articles lacking in text citations from april 2024 all articles lacking in text citations articles with multiple maintenance issues all articles with unsourced statements articles with unsourced statements from may 2026 all articles lacking reliable references articles lacking reliable references from may 2026 articles with unsourced statements from april 2024 this page was last edited on 29 august 2026 at 16 09 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct 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