Linux SFTP

SFTP restrict delete or remove or rename permission

sftp is an interactive file transfer program, similar to ftp(1), which performs all operations over an encrypted ssh(1) transport. sftp-server is a program that speaks the server side of SFTP…

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Linux capability

Linux capabilities with getcap|setcap and file capabilities

For the purpose of performing permission checks, traditional UNIX implementations distinguish two categories of processes: privileged processes (whose effective user ID is 0, referred to as superuser or root), and…

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How to bind tcp|udp ports below 1024 with non-root account|privilege

Port numbers below 1024 are reserved for superuser i.e. root so a normal user cannot bind to ports in this range. Privileged port ranges are defined in kernel source code…

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SSH Delay Login

SSH login delay|slow

Many times we observe there is some delay in SSH login and the delay might be from 2 seconds to 2 minutes. There are a few troubleshooting steps we need…

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