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user:jkendal6:start [2017/10/05 18:13] – jkendal6user:jkendal6:start [2017/10/26 17:57] (current) – jkendal6
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 Execute and see it: echo “$t” (should say what t was set to) Execute and see it: echo “$t” (should say what t was set to)
 +
 +--------------------------------------------------------------------------
  
 __Text Manipulation__ __Text Manipulation__
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 - [^]- Inverted character class; do not match 1 of any of enclosed symbols. - [^]- Inverted character class; do not match 1 of any of enclosed symbols.
  
 +--------------------------------------------------------------------------
 +
 +
 +__Cut Command__
 +
 +If you wanted a specific row to cut out of a text document.
 +
 +cut -c x (x meaning how many bits) filename > export filename
 +
 +-------------------------------------------------------------------------
 +
 +__Head Command__
 +
 +This is to show parts of the document from the top end.
 +
 +head -n x (x meaning how many rows to show from the top) filename > export.
 +
 +-------------------------------------------------------------------------
 +
 +__Tail Command__
 +
 +To show text or data in a document to show from bottom of the document to the specified row height.
 +
 +tail -n x (x meaning how many rows to show from the bottom) filename >export
 +
 +------------------------------------------------------------------------
 +
 +__get any conversions to a different base.__
 +
 +For base 2. (binary)
 +
 +command : echo “obase=2;[number]” | bc
 +
 +For base 8. (octal)
 +
 +command : echo “obase=8;[number]” | bc
 +
 +For base 10. (decimal)
 +
 +command : echo “obase=10;[number]” | bc
 +
 +For base 16. (hexidecimal)
 +
 +command : echo “obase=16;[number]” | bc
 +
 +---------------------------------------------------------------------
 +
 +__chmod utilities__
 +
 +__MAKE A FILE AN EXECUTABLE__
 +
 +command : chmod 0700 filename
 +
 +__Make a file readable__
 +
 +command : chmod 0600 filename
 +
 +-----------------------------------------------------------------------
  
  
user/jkendal6/start.1507227209.txt.gz · Last modified: 2017/10/05 18:13 by jkendal6

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