Thank you for always being indebted to https://qiita.com/ironsand/items/fb05869080f6ed724816.
When there were many users, it was difficult to see because there were many users who were no crontab, so I made it easier to see.
for user in $(cut -f1 -d: /etc/passwd); do echo -n :kaigyo1:[${user}]:kaigyo2:;\
crontab -u $user -l 2>&1 ; done | grep -v "no crontab" | sed s/:kaigyo1:/\\n\\n/ \
| sed s/:kaigyo2:/\\n/
1 line version
for user in $(cut -f1 -d: /etc/passwd); do echo -n :kaigyo1:[${user}]:kaigyo2:; crontab -u $user -l 2>&1 ; done | grep -v "no crontab" | sed s/:kaigyo1:/\\n\\n/ | sed s/:kaigyo2:/\\n/
Only for root users.
[root@myserver ~]# for user in $(cut -f1 -d: /etc/passwd); do echo -n :kaigyo1:[${user}]:kaigyo2:; crontab -u $user -l 2>&1 ; done | grep -v "no crontab" | sed s/:kaigyo1:/\\n\\n/ | sed s/:kaigyo2:/\\n/
[a_san]
#Ansible: kirei ni suru
0 6 * * * /bin/bash /home/a_san/hamigaki.sh >> /tmp/hamigaki.log
#Ansible: energy hokyu
10 6 * * * /bin/bash /home/a_san/asa_gohan.sh >> /tmp/asa_gohan.log
[c_san]
#Ansible: miharasi ii
1 10 * * 0 /usr/bin/yamanobori --config /etc/yamanobori.yml /etc/yamanobori_action_file.yml
(b_san is a no crontab image)