Differences

This shows you the differences between two versions of the page.

--- linux:start [2023-08-26 14:13] – created dave
+++ linux:start [2024-02-27 15:19] (current) – dave
@@ Line 1: / Line 1: @@
 ====== Linux ======
-Info on that horrible operating system that's a million times better than Micro$oft Windoze. Why do I say it's horrible? Mostly because I don't spend enough time there to know how to do things and figuring it out is a PITA.
+Info on that horrible operating system that's a million times better than Micro$oft Windoze. Why do I say it's horrible? Mostly because I don't spend enough time there to know how to do things and figuring it out is often a PITA.
+  * [[Bash]]
+  * [[inputrc]]
+  * [[Services]]
+  * [[rclone]]
+-----------------------
+===== Commifying a number in Linux =====
+<code>
+grep MemTotal /proc/meminfo | tr -s ' ' | cut -d ' ' -f 2 | xargs printf "%'d\n"
+</code>
+Bonus: That particular command tells you how much memory is installed. I think.
+-----------------------
+===== Pad IPs to Make Them Sortable =====
+<code>
+echo 172.16.16.112/30 | awk -F '[./]' '{printf "%03d.%03d.%03d.%03d/%03d\n", $1,$2,$3,$4,$5}'
+.016.016.112/030
+</code>
+-----------------------
+===== Date =====
+My preferred date/time format is ISO 8601.
+<code>date '+%Y-%m-%d_%H:%M:%S'</code>
+Can also be accomplished with...
+<code>date '+%F_%T'</code>
+Specific timezone and 3 hours in the future...
+<code>TZ="America/New_York" date -d "+3 hours" '+%Y-%m-%d_%H:%M:%S'</code>
+-----------------------
+===== Find =====
+I never remember how to find old files... either of these will work. The second one uses minutes (I don't know why you'd want to) and shows how to exclude files.
+  find DIR -name "*_FILENAME-*.gz" -mtime +45
+  find . ! -name '*NOT_THIS*.gz' -mmin +$((45*24*60))
+Add this to the end and anything that matches will be deleted.
+<code>
+-exec rm -f {} \;
+</code>
+Limit depth to current directory.
+<code>
+find . -maxdepth 1 -name "v*.tar.gz" -mtime +30
+</code>
+# to delete empty dirs
+<code>
+find  -type d -empty -delete
+</code>
+# to delete files over some age & empty dirs
+<code>
+find /some/path -depth \( \( -type f -daystart -mtime +100 \) -o -type d -empty \) -ls
+</code>
+-----------------------
+===== Find the Fat Folder =====
+Useful for finding which directory is sucking up all your disk space.
+<code>
+du -h --max-depth=1 | sort -hr
+</code>