Differences

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--- bash_oneliners [2020/06/10 15:26] – admin
+++ bash_oneliners [2025/08/06 12:07] (current) – admin
@@ Line 16: / Line 16: @@
   * To find the largest file in all sub-directories:
 <code>
-find /path/to/folder -type f -exec ls -s {} \; | sort -nr | awk 'NR==1 { $1=""; sub(/^ /, ""); print }'
+find . -type f -exec ls -s {} \; | sort -nr | awk 'NR==1 { $1=""; sub(/^ /, ""); print }'
 </code>
   * grep for valid IP Addresses.
@@ Line 29: / Line 29: @@
 <code>
 free && sync && echo 3 > /proc/sys/vm/drop_caches && free
+</code>
+  * rescan all SCSI buses
+<code>
+for i in /sys/class/scsi_host/host{0..32}/scan; do echo "- - -" > $i; done
+</code>
+  * enlarge LVM
+<code>
+fdisk /dev/sdk
+#set partition type to Linux LVM (type 8e)
+pvcreate /dev/sdk1
+vgextend VolGroupDB /dev/sdk1
+lvextend -l +100%FREE /dev/mapper/VolGroupDB-data
+resize2fs -p /dev/mapper/VolGroupDB-data
+#for xfs use xfs_growfs /dev/mapper/VolGroupDB-data
+parted -a optimal /dev/sdc mklabel gpt
+parted -a optimal /dev/sdc mkpart p 0% 100%
+parted -a optimal /dev/sdc set 1 lvm on
+vgextend VGEXL /dev/sdf1
+lvresize -l +100%free /dev/mapper/VGEXL-exllv
+</code>
+  * Enlarge LVM 2
+<code>
+echo '1' > /sys/class/scsi_disk/0\:0\:3\:0/device/rescan
+yum install cloud-utils-growpart
+growpart  /dev/sdd 1
+pvresize /dev/sdd1
+lvextend -l +100%FREE /dev/mapper/VGKUB-lv_kub
+xfs_growfs /dev/mapper/VGKUB-lv_kub
+</code>
+  * polkit logging for debugging
+<code>
+cat /etc/polkit-1/rules.d/50-apt.rules
+polkit.addRule(function(action, subject) {
+    polkit.log("Evaluating action: " + action.id);
+    polkit.log("User: " + subject.user + ", Groups: " + subject.getGroups());
+    if (action.id.startsWith("org.freedesktop.packagekit.") ||
+        action.id == "org.debian.apt.update-cache" ||
+        action.id == "org.debian.apt.upgrade" ||
+        action.id == "org.debian.apt.remove" ||
+        action.id == "org.debian.apt.upgrade-packages" ||
+        action.id == "org.debian.apt.install") {
+        polkit.log("Authorization granted for action: " + action.id);
+        return polkit.Result.YES;
+    }
+    polkit.log("Authorization denied for action: " + action.id);
+});
 </code>