diff --git a/categories/devops.md b/categories/devops.md
index 032b6d2..314980d 100644
--- a/categories/devops.md
+++ b/categories/devops.md
@@ -85,44 +85,41 @@ terraform apply # Apply changes to cluster
 
 [Wikipedia](https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing)
 
-**Address**|**Difference**|**Mask**|**Addresses**|**Relative**|**Restrictions**|**Typical use**|
-:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:
-format|to last address| | |to class|on a, b, c and d| |
- | | | |A, B, C|(0..255 unless noted)| |
-Decimal|2n| | | | | |
-a.b.c.d/32|+0.0.0.0|255.255.255.255|1|20|​1⁄256 C| |Host route
-a.b.c.d/31|+0.0.0.1|255.255.255.254|2|21|​1⁄128 C|d = 0 ... (2n) ... 254|Point to point links (RFC 3021)
-a.b.c.d/30|+0.0.0.3|255.255.255.252|4|22|​1⁄64 C|d = 0 ... (4n) ... 252|Point to point links (glue network)
-a.b.c.d/29|+0.0.0.7|255.255.255.248|8|23|​1⁄32 C|d = 0 ... (8n) ... 248|Smallest multi-host network
-a.b.c.d/28|+0.0.0.15|255.255.255.240|16|24|​1⁄16 C|d = 0 ... (16n) ... 240|Small LAN
-a.b.c.d/27|+0.0.0.31|255.255.255.224|32|25|⅛ C|d = 0 ... (32n) ... 224|
-a.b.c.d/26|+0.0.0.63|255.255.255.192|64|26|¼ C|d = 0, 64, 128, 192|
-a.b.c.d/25|+0.0.0.127|255.255.255.128|128|27|½ C|d = 0, 128|Large LAN
-a.b.c.0/24|+0.0.0.255|255.255.255.0|256|28|1 C| |
-a.b.c.0/23|+0.0.1.255|255.255.254.0|512|29|2 C|c = 0 ... (2n) ... 254|
-a.b.c.0/22|+0.0.3.255|255.255.252.0|1,024|210|4 C|c = 0 ... (4n) ... 252|Small business
-a.b.c.0/21|+0.0.7.255|255.255.248.0|2,048|211|8 C|c = 0 ... (8n) ... 248|Small ISP/ large business
-a.b.c.0/20|+0.0.15.255|255.255.240.0|4,096|212|16 C|c = 0 ... (16n) ... 240|
-a.b.c.0/19|+0.0.31.255|255.255.224.0|8,192|213|32 C|c = 0 ... (32n) ... 224|ISP/ large business
-a.b.c.0/18|+0.0.63.255|255.255.192.0|16,384|214|64 C|c = 0, 64, 128, 192|
-a.b.c.0/17|+0.0.127.255|255.255.128.0|32,768|215|128 C|c = 0, 128|
-a.b.0.0/16|+0.0.255.255|255.255.0.0|65,536|216|256 C = B| |
-a.b.0.0/15|+0.1.255.255|255.254.0.0|131,072|217|2 B|b = 0 ... (2n) ... 254|
-a.b.0.0/14|+0.3.255.255|255.252.0.0|262,144|218|4 B|b = 0 ... (4n) ... 252|
-a.b.0.0/13|+0.7.255.255|255.248.0.0|524,288|219|8 B|b = 0 ... (8n) ... 248|
-a.b.0.0/12|+0.15.255.255|255.240.0.0|1,048,576|220|16 B|b = 0 ... (16n) ... 240|
-a.b.0.0/11|+0.31.255.255|255.224.0.0|2,097,152|221|32 B|b = 0 ... (32n) ... 224|
-a.b.0.0/10|+0.63.255.255|255.192.0.0|4,194,304|222|64 B|b = 0, 64, 128, 192|
-a.b.0.0/9|+0.127.255.255|255.128.0.0|8,388,608|223|128 B|b = 0, 128|
-a.0.0.0/8|+0.255.255.255|255.0.0.0|16,777,216|224|256 B = A| |Largest IANA block allocation
-a.0.0.0/7|+1.255.255.255|254.0.0.0|33,554,432|225|2:00 am|a = 0 ... (2n) ... 254|
-a.0.0.0/6|+3.255.255.255|252.0.0.0|67,108,864|226|4:00 am|a = 0 ... (4n) ... 252|
-a.0.0.0/5|+7.255.255.255|248.0.0.0|134,217,728|227|8:00 am|a = 0 ... (8n) ... 248|
-a.0.0.0/4|+15.255.255.255|240.0.0.0|268,435,456|228|16 A|a = 0 ... (16n) ... 240|
-a.0.0.0/3|+31.255.255.255|224.0.0.0|536,870,912|229|32 A|a = 0 ... (32n) ... 224|
-a.0.0.0/2|+63.255.255.255|192.0.0.0|1,073,741,824|230|64 A|a = 0, 64, 128, 192|
-a.0.0.0/1|+127.255.255.255|128.0.0.0|2,147,483,648|231|128 A|a = 0, 128|
-0.0.0.0/0|+255.255.255.255|0.0.0.0|4,294,967,296|232|256 A| | 
+|**Address**|**Difference**|**Mask**|**Addresses**|**Relative**|**Restrictions**|**Typical use**|
+| :-----:|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|
+|a.b.c.d/32|+0.0.0.0|255.255.255.255|1|20|​1⁄256 C| |Host route
+|a.b.c.d/31|+0.0.0.1|255.255.255.254|2|21|​1⁄128 C|d = 0 ... (2n) ... 254|Point to point links (RFC 3021)
+|a.b.c.d/30|+0.0.0.3|255.255.255.252|4|22|​1⁄64 C|d = 0 ... (4n) ... 252|Point to point links (glue network)
+|a.b.c.d/29|+0.0.0.7|255.255.255.248|8|23|​1⁄32 C|d = 0 ... (8n) ... 248|Smallest multi-host network
+|a.b.c.d/28|+0.0.0.15|255.255.255.240|16|24|​1⁄16 C|d = 0 ... (16n) ... 240|Small LAN
+|a.b.c.d/27|+0.0.0.31|255.255.255.224|32|25|⅛ C|d = 0 ... (32n) ... 224|
+|a.b.c.d/26|+0.0.0.63|255.255.255.192|64|26|¼ C|d = 0, 64, 128, 192|
+|a.b.c.d/25|+0.0.0.127|255.255.255.128|128|27|½ C|d = 0, 128|Large LAN
+|a.b.c.0/24|+0.0.0.255|255.255.255.0|256|28|1 C| |
+|a.b.c.0/23|+0.0.1.255|255.255.254.0|512|29|2 C|c = 0 ... (2n) ... 254|
+|a.b.c.0/22|+0.0.3.255|255.255.252.0|1,024|210|4 C|c = 0 ... (4n) ... 252|Small business
+|a.b.c.0/21|+0.0.7.255|255.255.248.0|2,048|211|8 C|c = 0 ... (8n) ... 248|Small ISP/ large business
+|a.b.c.0/20|+0.0.15.255|255.255.240.0|4,096|212|16 C|c = 0 ... (16n) ... 240|
+|a.b.c.0/19|+0.0.31.255|255.255.224.0|8,192|213|32 C|c = 0 ... (32n) ... 224|ISP/ large business
+|a.b.c.0/18|+0.0.63.255|255.255.192.0|16,384|214|64 C|c = 0, 64, 128, 192|
+|a.b.c.0/17|+0.0.127.255|255.255.128.0|32,768|215|128 C|c = 0, 128|
+|a.b.0.0/16|+0.0.255.255|255.255.0.0|65,536|216|256 C = B| |
+|a.b.0.0/15|+0.1.255.255|255.254.0.0|131,072|217|2 B|b = 0 ... (2n) ... 254|
+|a.b.0.0/14|+0.3.255.255|255.252.0.0|262,144|218|4 B|b = 0 ... (4n) ... 252|
+|a.b.0.0/13|+0.7.255.255|255.248.0.0|524,288|219|8 B|b = 0 ... (8n) ... 248|
+|a.b.0.0/12|+0.15.255.255|255.240.0.0|1,048,576|220|16 B|b = 0 ... (16n) ... 240|
+|a.b.0.0/11|+0.31.255.255|255.224.0.0|2,097,152|221|32 B|b = 0 ... (32n) ... 224|
+|a.b.0.0/10|+0.63.255.255|255.192.0.0|4,194,304|222|64 B|b = 0, 64, 128, 192|
+|a.b.0.0/9|+0.127.255.255|255.128.0.0|8,388,608|223|128 B|b = 0, 128|
+|a.0.0.0/8|+0.255.255.255|255.0.0.0|16,777,216|224|256 B = A| |Largest IANA block allocation
+|a.0.0.0/7|+1.255.255.255|254.0.0.0|33,554,432|225|2:00 am|a = 0 ... (2n) ... 254|
+|a.0.0.0/6|+3.255.255.255|252.0.0.0|67,108,864|226|4:00 am|a = 0 ... (4n) ... 252|
+|a.0.0.0/5|+7.255.255.255|248.0.0.0|134,217,728|227|8:00 am|a = 0 ... (8n) ... 248|
+|a.0.0.0/4|+15.255.255.255|240.0.0.0|268,435,456|228|16 A|a = 0 ... (16n) ... 240|
+|a.0.0.0/3|+31.255.255.255|224.0.0.0|536,870,912|229|32 A|a = 0 ... (32n) ... 224|
+|a.0.0.0/2|+63.255.255.255|192.0.0.0|1,073,741,824|230|64 A|a = 0, 64, 128, 192|
+|a.0.0.0/1|+127.255.255.255|128.0.0.0|2,147,483,648|231|128 A|a = 0, 128|
+|0.0.0.0/0|+255.255.255.255|0.0.0.0|4,294,967,296|232|256 A| |
 
 # tools
 ## git