update

docs/linux/s3.md

@@ -133,13 +133,27 @@ Both a CLI and Python SDK for S3 and other storage systems.
 ```bash
 pip install megfile
 
+### configure 
+
 # use env to config s3 access key
 export AWS_ACCESS_KEY_ID=xxx
 export AWS_SECRET_ACCESS_KEY=xxx
 export AWS_ENDPOINT_URL=https://xxx # NOTE: different from s5cmd!
 
-# or config with CLI
-megfile config s3 AK SK --endpoint-url http://<ip>:<port>
+# or config with CLI (will modify ~/.aws/credentials)
+megfile config s3 <AK> <SK> --endpoint-url http://xxx
+
+### megfile also supports configure multiple s3 endpoints!
+
+# use env var (not recommended due to capital letters)
+export PROFILE1__AWS_ACCESS_KEY_ID=xxx
+export PROFILE1__AWS_SECRET_ACCESS_KEY=xxx
+export PROFILE1__AWS_ENDPOINT_URL=https://xxx
+
+# config with CLI
+megfile config s3 <AK> <SK> --endpoint-url http://xxx --profile-name profile1
+
+# these named profiles can be used as `s3+profile1://bucket/file`
 ```
 
 ### CLI
@@ -148,6 +162,9 @@ megfile config s3 AK SK --endpoint-url http://<ip>:<port>
 megfile ls s3://bucket
 megfile cat s3://bucket/file
 megfile cp s3://bucket/file local_file
+
+# named profile
+megfile ls s3+profile1://bucket/file
 ```
 
 Unfortunately you cannot perform bucket-level operations with `megfile` CLI: