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- $ ls -la /dev/shm
- drwxrwxrwt 2 root root 600 Jun 20 11:18 .
- drwxr-xr-x 22 root root 3680 Jun 19 12:43 ..
- -rw-rw-rw- 1 simbot simusers 500032 Jun 20 10:35 Sim_SharedMem_SLM__data_0
- $ groups | grep simusers -q && echo member || echo not member
- member
- $ rm -f /dev/shm/Sim_SharedMem_SLM__data_0
- rm: cannot remove '/dev/shm/Sim_SharedMem_SLM__data_0': Operation not permitted
- $ /usr/local/bin/badProcess
- ^C
- $ ls -la /dev/shm
- drwxrwxrwt 2 root root 640 Jun 20 11:31 .
- drwxr-xr-x 22 root root 3680 Jun 19 12:43 ..
- -rw-rw-rw- 1 stew stew 500032 Jun 20 11:31 Sim_SharedMem_SLM__data_0
- -rw-rw-rw- 1 stew stew 500032 Jun 20 11:31 Sim_SharedMem_SLM__data_1
- -rw-rw-rw- 1 stew stew 500032 Jun 20 11:31 Sim_SharedMem_SLM__data_2
- -rw-rw-rw- 1 stew stew 500032 Jun 20 11:31 Sim_SharedMem_SLM__data_3
- $ sudo chown simbot Sim_SharedMem_SLM__data_1
- $ sudo chown :simusers Sim_SharedMem_SLM__data_2
- $ sudo chown simbot:simusers Sim_SharedMem_SLM__data_3
- $ ls -la /dev/shm
- drwxrwxrwt 2 root root 640 Jun 20 11:31 .
- drwxr-xr-x 22 root root 3680 Jun 19 12:43 ..
- -rw-rw-rw- 1 stew stew 500032 Jun 20 11:31 Sim_SharedMem_SLM__data_0
- -rw-rw-rw- 1 simbot stew 500032 Jun 20 11:31 Sim_SharedMem_SLM__data_1
- -rw-rw-rw- 1 stew simusers 500032 Jun 20 11:31 Sim_SharedMem_SLM__data_2
- -rw-rw-rw- 1 simbot simusers 500032 Jun 20 11:31 Sim_SharedMem_SLM__data_3
- $ rm /dev/shm/*
- rm: cannot remove 'Sim_SharedMem_SLM__data_1`': Operation not permitted
- rm: cannot remove 'Sim_SharedMem_SLM__data_3`': Operation not permitted
- $ lsattr Sim_SharedMem_SLM__data_0
- lsattr: Inappropriate ioctl for device While reading flags on Sim_SharedMem_SLM__data_0
- $ mount | grep /dev/shm
- tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
- $ getfacl /dev/shm
- getfacl: Removing leading '/' from absolute path names
- # file: dev/shm
- # owner: root
- # group: root
- # flags: --t
- user::rwx
- group::rwx
- other::rwx
- $ getfacl /dev/shm/Sim_SharedMem_SLM__data_0
- getfacl: Removing leading '/' from absolute path names
- # file: dev/shm/Sim_SharedMem_SLM__data_0
- # owner: simbot
- # group: simusers
- user::rw-
- group::rw-
- other::rw-
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