SU(1) SU(1) (NAME) su - (SYNOPSIS) su [] [-] [ [...]] (DESCRIPTION) su . su root . . su HOME SHELL ( USER LOGNAME root ) . --login ( -) . su PAM . su wheel PAM . su ( ) set-user-ID runuser(1) PAM . PAM setpriv(1) . su PAM (pam_getenvlist(3)) . --login --preserve-environment PAM . 2.38 su RLIMIT_NICE RLIMIT_RTPRIO RLIMIT_FSIZE RLIMIT_AS RLIMIT_NOFILE . (OPTIONS) -c, --command= -c. -f, --fast -f . -g, --group= . root . -G, --supp-group= . root . --group . -, -l, --login (login shell) : o TERM --whitelist-environment o HOME SHELL USER LOGNAME PATH o o argv[0] '-' -m, -p, --preserve-environment HOME SHELL USER LOGNAME. --login . -P, --pty (pseudo-terminal) . . TIOCSTI ioctl . ( su --pty - _ -c &). su ( ). . (pipe) ( echo "date" | su --pty) ECHO . -s, --shell= . : o --shell o SHELL --preserve-environment o passwd o /bin/sh ( /etc/shells ) --shell SHELL root . --session-command= -c ( ). -w, --whitelist-environment= --login . HOME SHELL USER LOGNAME PATH . -h, --help . -V, --version . (SIGNALS) SIGINT SIGQUIT SIGTERM su . SIGTERM SIGKILL . (CONFIG FILES) su /etc/default/su /etc/login.defs . su : FAIL_DELAY () . . ENV_PATH () PATH . /usr/local/bin:/bin:/usr/bin . ENV_ROOTPATH () ENV_SUPATH () PATH root . ENV_SUPATH . /usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin . ALWAYS_SET_PATH () yes --login --preserve-environment su PATH . PATH /bin /sbin /usr --login PAM ( pam_env(8)) . (EXIT STATUS) su . su . su: 1 126 127 (FILES) /etc/pam.d/su PAM /etc/pam.d/su-l PAM --login /etc/default/su logindef /etc/login.defs logindef (NOTES) su btmp lastlog . su PAM . pam_lastlog(8) pam_lastlog(8) lastlog : session required pam_lastlog.so nowtmp (HISTORY) su su coreutils David MacKenzie . util-linux Karel Zak . (AUTHOR) Karel Zak David MacKenzie. (REPORTING BUGS) : (COPYRIGHT) (C) 2014 Karel Zak GPLv2+: . : . . (SEE ALSO) setpriv(1), login.defs(5), shells(5), pam(8), runuser(1) util-linux 2.38.1 2022-05-11 SU(1)