下面是我用来获取公钥的命令序列。一旦我得到公钥，我想从输出中提取模数。

1. openssl genpkey -algorithm rsa -pkeyopt rsa_keygen_bits：1024 -out key_rsa_private_1024.pem
2. openssl rsa -inform PEM -in key_rsa_private_1024.pem -text
3. openssl rsa -in key_rsa_private_1024.pem -pubout -out key_rsa_pub_1024.pub
4. openssl rsa -pubin -inform PEM -in key_rsa_pub_1024.pub -text
   输出如下所示-

Public-Key: (1024 bit)
Modulus:
    00:c5:f3:4b:c7:a3:c0:23:7a:0e:d4:f3:3e:07:06:
    4a:1e:7c:9d:ed:4d:23:8f:4b:00:6f:bc:f3:05:3b:
    62:2e:35:00:78:d2:af:7f:7a:f0:fe:e3:c0:37:f6:
    c3:58:4f:34:91:b7:91:a1:32:3e:d5:28:ab:f7:5d:
    5e:e6:ba:14:76:b8:84:d6:45:2d:48:47:68:53:39:
    54:55:d3:70:ef:f8:92:09:78:77:31:d6:ee:e5:6f:
    8e:59:4d:c2:40:1f:6d:7b:32:c7:b6:91:c4:75:9e:
    95:d6:d7:d9:39:60:f7:13:d5:95:4e:ff:4b:7d:dc:
    e8:fd:b0:a1:25:57:32:f5:ff
Exponent: 65537 (0x10001)
writing RSA key
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDF80vHo8Ajeg7U8z4HBkoefJ3t
TSOPSwBvvPMFO2IuNQB40q9/evD+48A39sNYTzSRt5GhMj7VKKv3XV7muhR2uITW
RS1IR2hTOVRV03Dv+JIJeHcx1u7lb45ZTcJAH217Mse2kcR1npXW19k5YPcT1ZVO
/0t93Oj9sKElVzL1/wIDAQAB
-----END PUBLIC KEY-----

字符串
我研究了一些命令，如grep和awk，但这些命令不能给予所需的输出。