Update cheatsheets

tldr/linux/iscsiadm

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# iscsiadm
+
+> Manage iSCSI sessions, nodes, and discovery.
+> More information: <https://manned.org/iscsiadm>.
+
+- Show active iSCSI sessions:
+
+`sudo iscsiadm {{[-m|--mode]}} session`
+
+- List all known iSCSI nodes:
+
+`sudo iscsiadm {{[-m|--mode]}} node`
+
+- Discover available iSCSI targets on a portal (no authentication):
+
+`sudo iscsiadm {{[-m|--mode]}} discovery {{[-t|--type]}} sendtargets {{[-p|--portal]}} {{ip_address}}`
+
+- Log in to a specific iSCSI target without authentication:
+
+`sudo iscsiadm {{[-m|--mode]}} node {{[-T|--targetname]}} {{iqn}} {{[-p|--portal]}} {{ip_address}}:3260 {{[-l|--login]}}`
+
+- Log out from a specific iSCSI target:
+
+`sudo iscsiadm {{[-m|--mode]}} node {{[-T|--targetname]}} {{iqn}} {{[-p|--portal]}} {{ip_address}}:3260 {{[-u|--logout]}}`
+
+- Create an iSCSI node when discovery is blocked (for CHAP authentication):
+
+`sudo iscsiadm {{[-m|--mode]}} node {{[-o|--op]}} new {{[-T|--targetname]}} {{iqn}} {{[-p|--portal]}} {{ip_address}}:3260`
+
+- Configure CHAP authentication for an iSCSI target:
+
+`sudo iscsiadm {{[-m|--mode]}} node {{[-T|--targetname]}} {{iqn}} {{[-p|--portal]}} {{ip_address}}:3260 {{[-o|--op]}} update {{[-n|--name]}} node.session.auth.authmethod {{[-v|--value]}} CHAP`