diff --git a/docs.it4i/config.yml b/docs.it4i/config.yml
index 0446dcc7808b33c993d1bd5e7ed7a0f84f67b374..12b62dd05870225f1ca7c1119dec97d0a4cfa543 100644
--- a/docs.it4i/config.yml
+++ b/docs.it4i/config.yml
@@ -5,7 +5,7 @@ client_user: some_user
 zone: IT4I
 
 authscheme: "pam"
-ssl_ca_cert_file: "~/irods1.it4i.cz.crt"
+ssl_ca_cert_file: "/usr/local/etc/irods.it4i.cz.crt"
 ssl_encryption_key_size: 32
 ssl_encryption_algorithm: "AES-256-CBC"
 ssl_encryption_salt_size: 8
diff --git a/docs.it4i/dice.md b/docs.it4i/dice.md
index 2bb4c7274d870c3cda279819ba290bdfc9ca7b77..b966cbc0aeb5ae6e6ef664c7dc987417966ce5a3 100644
--- a/docs.it4i/dice.md
+++ b/docs.it4i/dice.md
@@ -48,15 +48,16 @@ We have to be sure about your identity, this will be done throught this steps:
 ![](img/irods_linking_link.jpg)
 
 - contact our support@it4i.cz by mail, we will create your account at our iRODS server.
-- fill this request for [EUDAT][h], please specify requested capacity.
+- ***fill this request on [EOSC-MARKETPLACE][h] - recommended *** or at [EUDAT][l] , please specify requested capacity.
+- ![](img/eosc-marketplace-active.jpg)
 - ![](img/eudat_request.jpg)
 
 ## ***Access to iRods Collection From Karolina***
 
 - access to cluster is must (it4i account)
 - iRODS clients are provided as a module on our ***Karolina*** cluster ( Barbora is in progress )
-- module irodsfs loads config file for irodsfs nad for icommands too
-- PAM passwords is password, you set in aai.it4i.cz
+- module irodsfs loads config file for irodsfs and for icommands too
+- password to irods is set already, but you can set new at aai.it4i.cz .
 
 ***How to mount your collection***
 
@@ -159,14 +160,14 @@ Enter your current PAM password:
 
 ```console
 cd ~
-wget https://docs.it4i.cz/irods1.it4i.cz.crt
+sudo wget https://docs.it4i.cz/irods.it4i.cz.crt -P /usr/local/etc/
 wget https://github.com/cyverse/irodsfs/releases/download/v0.7.6/irodsfs_amd64_linux_v0.7.6.tar
 tar -xvf ~/irodsfs_amd64_linux_v0.7.6.tar
 mkdir ~/IRODS ~/.irods
 cd ~/.irods && wget https://docs.it4i.cz/config.yml
 ```
 
-- edit `~/.irods/config.yml` with apropriate username
+- edit `~/.irods/config.yml` with username from aai
 
 ***How to mount your collection:***
 
@@ -206,8 +207,37 @@ total 0
 ### iCommands
 
 - this is linux client only, basic knowledge of commandline is neccessary
-- manual is for centos7
-- for ubuntu20 - there is [http://docs.snic.se/wiki/IRODS_iCommands_installation_on_Ubuntu_20.04#Authenticate_and_test_iRODS_iCommands_client][j]
+- we recommend Centos7, ubuntu 20 is optional
+
+***steps for Ubuntu20:***
+
+```console
+Prepare IRODS APT repository
+
+dejan@dejan:~$ LSB_RELEASE="bionic"
+dejan@dejan:~$ wget -qO - https://packages.irods.org/irods-signing-key.asc | sudo apt-key add -
+OK
+dejan@dejan:~$ echo "deb [arch=amd64] https://packages.irods.org/apt/ ${LSB_RELEASE}  main" \
+>   | sudo tee /etc/apt/sources.list.d/renci-irods.list
+deb [arch=amd64] https://packages.irods.org/apt/ bionic  main
+dejan@dejan:~$ sudo apt-get update
+dejan@dejan:~$ apt-cache search irods
+dejan@dejan:~$ wget -c \
+  http://security.ubuntu.com/ubuntu/pool/main/p/python-urllib3/python-urllib3_1.22-1ubuntu0.18.04.2_all.deb \
+  http://security.ubuntu.com/ubuntu/pool/main/r/requests/python-requests_2.18.4-2ubuntu0.1_all.deb \
+  http://security.ubuntu.com/ubuntu/pool/main/o/openssl1.0/libssl1.0.0_1.0.2n-1ubuntu5.10_amd64.deb
+dejan@dejan:~$ sudo apt install \
+  ./python-urllib3_1.22-1ubuntu0.18.04.2_all.deb \
+  ./python-requests_2.18.4-2ubuntu0.1_all.deb \
+  ./libssl1.0.0_1.0.2n-1ubuntu5.6_amd64.deb
+dejan@dejan:~$ rm -rf \
+  ./python-urllib3_1.22-1ubuntu0.18.04.2_all.deb \
+  ./python-requests_2.18.4-2ubuntu0.1_all.deb \
+  ./libssl1.0.0_1.0.2n-1ubuntu5.6_amd64.deb
+dejan@dejan:~$ sudo apt install -y irods-icommands
+```
+
+***Steps for centos***
 
 ```console
 sudo rpm --import https://packages.irods.org/irods-signing-key.asc
@@ -215,11 +245,11 @@ sudo wget -qO - https://packages.irods.org/renci-irods.yum.repo | sudo tee /etc/
 sudo yum install epel-release -y
 sudo yum install python-psutil python-jsonschema
 sudo yum install irods-icommands
-cd ~ && wget https://docs.it4i.cz/irods1.it4i.cz.crt
+sudo wget https://docs.it4i.cz/irods.it4i.cz.crt -P /usr/local/etc/
 mkdir ~/.irods/ && cd "$_" && wget https://docs.it4i.cz/irods_environment.json
 ```
 
-- edit ***irods_user_name*** in `~/.irods/irods_environment.json`
+- edit ***irods_user_name*** in `~/.irods/irods_environment.json` with username from aai
 
 ```console
 [some_user@local_pc ~]$ pwd
@@ -275,7 +305,7 @@ For more commands, use the `ihelp` command.
 [c]: https://irods.org/
 [d]: https://b2access.eudat.eu/
 [f]: https://aai.it4i.cz/realms/IT4i_IRODS/account/#/
-[h]: https://www.eudat.eu/contact-support-request?Service=B2SAFE
+[h]: https://marketplace.eosc-portal.eu/services/b2safe/offers
 [i]: https://cyberduck.io/download/
-[j]: http://docs.snic.se/wiki/IRODS_iCommands_installation_on_Ubuntu_20.04#Authenticate_and_test_iRODS_iCommands_client
-[k]: https://docs.it4i.cz/irods1.it4i.cz.crt
+[k]: https://docs.it4i.cz/irods.it4i.cz.crt
+[l]: https://www.eudat.eu/contact-support-request?Service=B2SAFE
diff --git a/docs.it4i/img/eosc-marketplace-active.jpg b/docs.it4i/img/eosc-marketplace-active.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..dd9feb3bd3d389c237acc5ddd2bf8146d2503822
Binary files /dev/null and b/docs.it4i/img/eosc-marketplace-active.jpg differ
diff --git a/docs.it4i/irods.it4i.cz.crt b/docs.it4i/irods.it4i.cz.crt
new file mode 100644
index 0000000000000000000000000000000000000000..3e13bc6d62b7e95fa0c442a0cf5ea452b7f612be
--- /dev/null
+++ b/docs.it4i/irods.it4i.cz.crt
@@ -0,0 +1,122 @@
+-----BEGIN CERTIFICATE-----
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+
+# subject: C=NL, O=GEANT Vereniging, CN=GEANT OV RSA CA 4
+# issuer:  C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust RSA Certification Authority
+# SHA256 Fingerprint: 37:83:4f:a5:ea:40:fb:f7:b6:11:96:95:59:62:e1:ca:05:58:87:24:35:e4:20:66:53:d3:f6:20:dd:8e:98:8e
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+L6KCq9NjRHDEjf8tM7qtj3u1cIiuPhnPQCjY/MiQu12ZIvVS5ljFH4gxQ+6IHdfG
+jjxDah2nGN59PRbxYvnKkKj9
+-----END CERTIFICATE-----
diff --git a/docs.it4i/irods_environment.json b/docs.it4i/irods_environment.json
index 9803206f772fcd6f2fdd9a0bfc2bf5c49d054712..ea79cde3ea485211a8de0e0b692430bba6229f23 100644
--- a/docs.it4i/irods_environment.json
+++ b/docs.it4i/irods_environment.json
@@ -1,11 +1,11 @@
 {
-    "irods_host": "irods1.it4i.cz",
+    "irods_host": "irods.it4i.cz",
     "irods_port": 1247,
     "irods_user_name": "some_user",
     "irods_zone_name": "IT4I",
     "irods_authentication_scheme": "pam_password",
     "irods_ssl_verify_server": "cert",
-    "irods_ssl_ca_certificate_file": "~/irods1.it4i.cz.crt",
+    "irods_ssl_ca_certificate_file": "/usr/local/etc/irods.it4i.cz.crt",
     "irods_encryption_algorithm": "AES-256-CBC",
     "irods_encryption_key_size": 32,
     "irods_encryption_num_hash_rounds": 16,