2016年3月8日 · While reading about environment variables, the one I came across was LOGNAME, I'd like to know the difference between this variable and whatever the command logname returns - as both of them did differ in what they returned.

The utility logname is broken in 16.04, apparently on purpose because it's possible to hack the value it returns, which could be a security flaw.

2019年8月2日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

2022年6月20日 · ssh -q remoteHost logname logname: no login name but. ssh -qt remoteHost logname roaima However, unlike you, if I connect normally I do get a login shell that creates an entry in /run/utmp: ssh remoteHost logname roaima …

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To get the login name portably, best is to use the logname command (if there's not been any login, it may return nothing). To get the user id, use id -u . To get one username corresponding to the current effective user id: id -un .

logname returns logname: no login name; It happens in the following terminals: lxterminal; xfce4-terminal; rxvt; On the other hand, in the following scenarios it works perfectly (who/w lists the user and logname functions): ssh-ing in; xterm / lxterm / uxterm

2019年4月13日 · The command "logname" gives me the name of the login user irrespective of subsequent "su"-calls. E.g. in current mint, the command "logname" is broken und gives no logname. I want to get its functinality by other commands. The output of the command "who -u" contains the desired information in one of its result lines, like:

2020年4月1日 · Systemd operates at a lower level than your shell environment. By this I mean, when you execute a command it is normally a child process of your shell environment which is a child process of your init daemon (systemd in this case).

2016年9月2日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.