![无法添加 cron 任务](https://linux22.com/image/779042/%E6%97%A0%E6%B3%95%E6%B7%BB%E5%8A%A0%20cron%20%E4%BB%BB%E5%8A%A1.png)
我正在尝试添加 cron 任务,以便在每次证书即将过期时更新证书,但似乎无法做到这一点。我使用了以下命令:crontab -e 0 12 * * * /usr/bin/certbot renew -quiet
crontab: invalid option -- 'q'
crontab: usage error: unrecognized option
usage: crontab [-u user] file
crontab [ -u user ] [ -i ] { -e | -l | -r }
(default operation is replace, per 1003.2)
-e (edit user's crontab)
-l (list user's crontab)
-r (delete user's crontab)
-i (prompt before deleting user's crontab)
还尝试了这个:rontab -e 0 12 * * * /usr/bin/certbot renew --quiet
并得到:
crontab: invalid option -- '-'
crontab: usage error: unrecognized option
usage: crontab [-u user] file
crontab [ -u user ] [ -i ] { -e | -l | -r }
(default operation is replace, per 1003.2)
-e (edit user's crontab)
-l (list user's crontab)
-r (delete user's crontab)
-i (prompt before deleting user's crontab)
这:crontab -e 0 12 * * * /usr/bin/certbot renew -q
crontab: invalid option -- 'q'
crontab: usage error: unrecognized option
usage: crontab [-u user] file
crontab [ -u user ] [ -i ] { -e | -l | -r }
(default operation is replace, per 1003.2)
-e (edit user's crontab)
-l (list user's crontab)
-r (delete user's crontab)
-i (prompt before deleting user's crontab)
这:crontab -e 0 12 * * * -q /usr/bin/certbot renew
crontab: invalid option -- 'q'
crontab: usage error: unrecognized option
usage: crontab [-u user] file
crontab [ -u user ] [ -i ] { -e | -l | -r }
(default operation is replace, per 1003.2)
-e (edit user's crontab)
-l (list user's crontab)
-r (delete user's crontab)
-i (prompt before deleting user's crontab)
这:crontab -e 0 12 * * * --quiet /usr/bin/certbot renew
crontab: invalid option -- '-'
crontab: usage error: unrecognized option
usage: crontab [-u user] file
crontab [ -u user ] [ -i ] { -e | -l | -r }
(default operation is replace, per 1003.2)
-e (edit user's crontab)
-l (list user's crontab)
-r (delete user's crontab)
-i (prompt before deleting user's crontab)
这:crontab -e 0 12 * * * /usr/bin/certbot renew
crontab: usage error: no arguments permitted after this option
usage: crontab [-u user] file
crontab [ -u user ] [ -i ] { -e | -l | -r }
(default operation is replace, per 1003.2)
-e (edit user's crontab)
-l (list user's crontab)
-r (delete user's crontab)
-i (prompt before deleting user's crontab)
我也尝试crontab -e 43 6 * * * certbot renew --post-hook "systemctl reload nginx"
过这个答案,但它抛出了:
crontab: invalid option -- '-'
crontab: usage error: unrecognized option
usage: crontab [-u user] file
crontab [ -u user ] [ -i ] { -e | -l | -r }
(default operation is replace, per 1003.2)
-e (edit user's crontab)
-l (list user's crontab)
-r (delete user's crontab)
-i (prompt before deleting user's crontab)
我不知道我还能做什么。我使用 Ubuntu 20.04。
答案1
你只想跑crontab -e
然后打Enter
。
然后您的 crontab 将出现在您的环境中配置的编辑器中。
在编辑器中,您可以然后将要添加的行添加到 crontab 中:
0 12 * * * /usr/bin/certbot renew -quiet
问题在于您试图一次性完成两个步骤。