CLI show log messages and file list /var/log commands are not working and popped up the error message.

{master}

user@router-RE0> show log messages

error: could not resolve file: messages

{master}

user@router-RE0> file list /var/log

error: Stat failed: /var/log/.

error: Stat failed: /var/log/..

error: Stat failed: /var/log/pfe_flow_stats.txt

error: Stat failed: /var/log/dfcd_enc

error: Stat failed: /var/log/dcd

error: Stat failed: /var/log/messages.9.gz

error: Stat failed: /var/log/utx.log

error: Stat failed: /var/log/shmlog

error: Stat failed: /var/log/jam_dfwd

error: Stat failed: /var/log/jam_dcd

error: Stat failed: /var/log/dfwc

error: Stat failed: /var/log/aprobed

error: Stat failed: /var/log/cosd

error: Stat failed: /var/log/jam_cosd

error: Stat failed: /var/log/jam_clksyncd

error: Stat failed: /var/log/jam_chassisd

error: Stat failed: /var/log/pm_longterm.txt

error: Stat failed: /var/log/lmpd

error: Stat failed: /var/log/messages

error: Stat failed: /var/log/interactive-commands

error: Stat failed: /var/log/gres-test-point

error: Stat failed: /var/log/chassisd

error: Stat failed: /var/log/wtmp

error: Stat failed: /var/log/mastership

error: Stat failed: /var/log/inventory

One of the customer engineers might change the direct /var/log permission which caused the issue.

JTAC had worked with the customer to use the chmod shell command to change the permission back to standard mode. It resolved the problem.