how tos

2025-01-13 15:42:40 +01:00
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--- a/content/content/HowTos/ca-certificate-in-debian.md
+++ b/content/content/HowTos/ca-certificate-in-debian.md
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+# How to add a CA certificate in Debian
+Copy CA file with extension `crt` into `/usr/local/share/ca-certificates/`.
+
+Call `update-ca-certificates` as root.
+
--- a/content/content/HowTos/colors-in-minicom.md
+++ b/content/content/HowTos/colors-in-minicom.md
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+# Colors in Minicom
+
+To start `minicom` in color mode use
+
+```
+minicom -c on
+```
+
+Switch terminal emulation to ANSI.
+
+Use escape sequences to actually change the color of text as described for instance here 
+
+https://www.lihaoyi.com/post/BuildyourownCommandLinewithANSIescapecodes.html.
+
+The base sequence is `\1b[Xm` where X is a number as described below.
+
+To get the colors in bright style, use the sequence `\x1b[X;1m`.
+
+Number | Color
+----|----
+0 | reset
+1 | highlight
+7 | inverse
+30 | black
+31 | red
+32 | green
+33 | yellow
+34 | blue
+35 | magenta
+36 | cyan
+37 | white
+
--- a/content/content/HowTos/iscsi-on-linux.md
+++ b/content/content/HowTos/iscsi-on-linux.md
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+# iSCSI on Linux
+
+## Preparation
+Install `open-iscsi`, at least on Debian systems.
+
+
+## Use an iSCSI target from Linux
+
+In our setup a Synology NAS at 172.16.200.19 provides the targets.
+
+First, run
+```
+   iscsiadm -m discovery -t sendtargets -p 172.16.200.19
+```
+to discover all provided targets.
+
+You get something like this
+```
+   172.16.200.19:3260,1 iqn.2000-01.com.synology:nas.Target-GitLab.db1c0541e7
+   [fe80::211:32ff:febe:da31]:3260,1 iqn.2000-01.com.synology:nas.Target-GitLab.db1c0541e7
+   172.16.200.19:3260,1 iqn.2000-01.com.synology:nas.Target-Bitwarden.db1c0541e7
+   [fe80::211:32ff:febe:da31]:3260,1 iqn.2000-01.com.synology:nas.Target-Bitwarden.db1c0541e7
+   172.16.200.19:3260,1 iqn.2000-01.com.synology:nas.Target-Nextcloud.db1c0541e7
+   [fe80::211:32ff:febe:da31]:3260,1 iqn.2000-01.com.synology:nas.Target-Nextcloud.db1c0541e7
+   172.16.200.19:3260,1 iqn.2000-01.com.synology:nas.Target-MariaDB.db1c0541e7
+   [fe80::211:32ff:febe:da31]:3260,1 iqn.2000-01.com.synology:nas.Target-MariaDB.db1c0541e7
+   172.16.200.19:3260,1 iqn.2000-01.com.synology:nas.Target-Backup.db1c0541e7
+   [fe80::211:32ff:febe:da31]:3260,1 iqn.2000-01.com.synology:nas.Target-Backup.db1c0541e7
+```
+
+Now, connect to the target using
+```
+   iscsiadm -m node --targetname "iqn.2000-01.com.synology:nas.Target-Backup.db1c0541e7" \
+     --portal 172.16.200.19 --login
+```
+
+A new SCSI device will be created. Check the name of the device using ''dmesg''. You see something like this
+```
+   [16924536.979916] scsi host13: iSCSI Initiator over TCP/IP
+   [16924537.010635] scsi 13:0:0:1: Direct-Access     SYNOLOGY iSCSI Storage    4.0  PQ: 0 ANSI: 5
+   [16924537.011449] sd 13:0:0:1: Attached scsi generic sg10 type 0
+   [16924537.012597] sd 13:0:0:1: [sdj] 209715200 512-byte logical blocks: (107 GB/100 GiB)
+   [16924537.012827] sd 13:0:0:1: [sdj] Write Protect is off
+   [16924537.012828] sd 13:0:0:1: [sdj] Mode Sense: 43 00 10 08
+   [16924537.013111] sd 13:0:0:1: [sdj] Write cache: enabled, read cache: enabled, supports DPO and FUA
+   [16924537.013361] sd 13:0:0:1: [sdj] Optimal transfer size 16384 logical blocks > dev_max (8192 logical blocks)
+   [16924537.018630] sd 13:0:0:1: [sdj] Attached SCSI disk
+```
+
+Now use `fdisk`, `mkfs` and if you like `blkid` on the new device and put it into the `/etc/fstab`.
+
+
+===== Authenticated target =====
+
+```
+    iscsiadm   --mode node  --targetname "iqn.2007-01.org.debian.foobar:CDs"  -p 192.168.0.1:3260 --op=update --name node.session.auth.authmethod --value=CHAP
+    iscsiadm   --mode node  --targetname "iqn.2007-01.org.debian.foobar:CDs"  -p 192.168.0.1:3260 --op=update --name node.session.auth.username --value=$Id
+    iscsiadm   --mode node  --targetname "iqn.2007-01.org.debian.foobar:CDs"  -p 192.168.0.1:3260 --op=update --name node.session.auth.password --value=$MDP
+    iscsiadm   --mode node  --targetname "iqn.2007-01.org.debian.foobar:CDs"  -p 192.168.0.1:3260 --login
+```
+
--- a/content/content/HowTos/occ-in-nextcloud-pod.md
+++ b/content/content/HowTos/occ-in-nextcloud-pod.md
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+# Execute occ in Nextcloud pod
+
+
+First, look up the name of the pod using
+```
+kubectl get pods -n nextcloud
+```
+
+Then, get into the pod using
+```
+kubectl exec --stdin --tty NAME_OF_THE_POD -c nextcloud -n nextcloud -- sh
+```
+
+Finally, within the pod
+```
+su -s /bin/sh www-data -c "php occ --help"
+```