various deletions

basics/archives.md

@@ -1,14 +1,10 @@
-# Automatic Backups with `find`
-
-> find /home/"$(whoami)" -type f -size -2M | xargs zip -u backup
-
 # Tar Archives
 
-Create ze files:
+*C*reate *z*e *f*iles!
 
 > tar czf file.tar.gz file1 file2
 
-Extract ze files:
+E*x*tract *z*e *f*iles:
 
 > tar xzf file.tar.gz
 
@@ -16,29 +12,11 @@ The .tar extension means two or more files are bundled together into a single fi
 
 Tarballs come with a number of arguments.
 
-- c means 'create'.
+## More Compression
 
-- v means 'verbose'.
+Extremely compressed files take longer to compress, but take up less disk space.
 
-- f means 'this is the file' and must always be the ultimate argument.
-
-- z means compression.
-
-So we can compress file1 and file2 into a single tar called 'archive' with:
-
-> tar czvf archive.tar.gz file1 file2
-
-Extraction uses 'x' instead of 'c'.
-
-> tar xzvf archive.tar.gz
-
-Create a very compressed file:
-
-> tar cfj super-compressed.tar.gz file1 file2
-
-# Example - Compressing all Latex Files in /home/
-
-> sudo find ~ -maxdepth 4 -name "*.txt" | xargs tar cvf latex-bundle.tar.gz
+> tar cfj super-compressed.tar.bz2 file1 file2
 
 # ssh backup
 
@@ -46,7 +24,7 @@ Back up an unmounted partition with ssh:
 
 > sudo dd if=/dev/sda1 | ssh -C ghost@192.168.0.10 "dd of=/home/ghost/backup.img" status=progress
 
-# img.xz
+# `xz`
 
 Install `xz`.
 
@@ -58,3 +36,23 @@ This then deletes the .xz file.  To keep it:
 
 > unxz --keep void.img.xz
 
+# `zip`
+
+Zip file1-3, and make a zip file called 'newsip.zip'.
+
+> zip newsip file1 file2 file3
+
+# Automatic Backups with `find`
+
+## `tar`
+
+Compressing all Latex Files in /home/.
+
+> sudo find ~ -maxdepth 4 -name "*.txt" | xargs tar cvf latex-bundle.tar.gz
+
+## `zip
+
+Install `zip`.
+
+> find /home/"$(whoami)" -type f -size -2M | xargs zip -u backup
+

basics/at.md

@@ -1,7 +1,3 @@
-`at` must be installed with:
-
-> sudo apt-get install at
-
 Then jobs can be specified with absolute time, such as:
 
 > at 16:20
@@ -30,5 +26,4 @@ This will print all pending IDs.  Remove a job by the ID with:
 
 > atrm 2
 
-Check /var/spool/cron/
-
+Check /var/spool/atd/

basics/bash.md

@@ -15,6 +15,7 @@ A double pipe will try one, and do the other if that fails.
 > cp -r ~/Archive ~/Backup || tar czf Archive.tar.gz *
 
 # REGEX
+
 Regular expression characters include:
 
 \\ ^ $ . | ? * + () [] {}
@@ -26,6 +27,7 @@ As a result, grep cannot read these characters as literal characters unless they
 ... will search the string 'wtf?' in the file log.txt.  Another version is egrep (now used with 'grep -e') which uses more characters as special characters, or fgrep, which treats all characters as literal strings.
 
 # Environmental Variables
+
 PWD, USER, PATH
 
 To display all environmental (but not local) variables, use
@@ -79,6 +81,7 @@ The sort function arranges lines alphabetically.  Use -r to reverse and -n to so
 Edit all examples of hey to hoi in greetings and print that to the file.
 
 # Measurement
+
 Measure how long a script takes for super-autism powers.
 
 > time [bash script]

basics/boot.md

@@ -32,18 +32,6 @@ Ctrl+c at boot then add in
 
 None of this is used by humans anymore - it's all systemd.
 
-# Systemd
-
-See what's running with ....
-
-> systemctl list-units
-
-Stop, start, whatever with:
-
-systemctl enable|stop|start httpd
-
-This starts httpd (Fedora's word for Apache2).
-
 # Boot Records
 
 'File System Tab' under /etc/fstab keeps track of the partitions and boot order.

basics/clock.md

@@ -1,4 +1,4 @@
-# Basics
+# `date`
 
 Show system time:
 
@@ -20,6 +20,18 @@ Manually set the hardware time to a specified date:
 
 > sudo hwclock --set --date="8/25/19 13:30:00"
 
+## Normal Date
+
+> date +%d/%m/%y
+
+# Unix Time
+
+Computers started counting time on January 1st, 1970, and added one second-per-second.  If your clock shows you're in the 70's, it's reset to the start.
+
+Track the time in Unix-time:
+
+> date +%s
+
 # Network Time Providers
 
 Servers which take their time from an observatory we call Stratum 1 servers.  Servers which takes their time from Stratum n servers are Stratum n+1 servers.