Shlomi Boutnaru, Ph.D.The Linux Security Journey — ACL (Access Control Lists)In general, ACL (Access Control Lists) provides the ability to set permissions to a file/directory in a more granular way then the normal…2h ago2h ago
Shlomi Boutnaru, Ph.D.The Linux Security Journey — SGID (Saved Group ID)In this context SGID stands for “Saved Group ID” (and it is different from SGID bit). It is used when we have a task (process/thread)…18h ago18h ago
Shlomi Boutnaru, Ph.D.The Linux Process Journey — loginOverall, “login” is an ELF binary located by default at “/usr/bin/login” (or /bin/login) which is used to begin a session on a Linux…1d ago1d ago
Shlomi Boutnaru, Ph.D.The Linux Security Journey — EGID (Effective Group ID)As with EUID (https://medium.com/@boutnaru/the-linux-security-journey-euid-effective-user-id-65f351532b79 ) we also have EGID (Effective…3d ago3d ago
Shlomi Boutnaru, Ph.D.The Linux Security Journey — Secure Execution ModeIn general, a binary is executed in “Secure Execution Mode” in case the “AT_SECURE” entry of the auxiliary vector…4d ago4d ago
Shlomi Boutnaru, Ph.D.The Linux Process Journey — “dmesg” (Print/Control the Kernel Ring Buffer)“dmesg” is an ELF binary located at “/usr/bin/dmesg“ (or “/bin/dmesg“). The Linux kernel writes different messages to a kernel ring buffer…6d ago6d ago
Shlomi Boutnaru, Ph.D.The Windows Concept Journey — Windows Package ManagerIn general, we can define a package manager as a set of tools used for installing/configuring/updating software in an automatic manner…Jun 15Jun 15
Shlomi Boutnaru, Ph.D.The Windows Concept Journey — “Microsoft Store” (formally Windows Store)Microsoft Store was formerly known as Windows Store, it is a distribution platform created and managed by Microsoft. It was created in…Jun 15Jun 15
Shlomi Boutnaru, Ph.D.The Windows Concept Journey — mklink (Make Link)“mklink” is a builtin command of “cmd.exe”…Jun 14Jun 14
Shlomi Boutnaru, Ph.D.The Linux Process Journey — “rcub” (Read-Copy Update Boost)“rcub” is a Linux kernel thread created as part of the “rcu_spawn_one_boost_kthread” function…Jun 14Jun 14