*** Daniel's Linux Command Notes ***

# ######

for fred in ~edwards/sl/io/*.c; do echo "*** $fred ***" >> t.c; cat $fred >> t.c; done
#Takes all the *.c files and appends their contents to t.c. This will put the
#name of each file in t.c before it's appended.

commands to research
 comm (Is there a better way to tell columns apart?)
 cut, paste

# Format #
[command call
 description

<command call which isn't default to Debian
 description "another command" more description 'an argument'

## General file information ##
[md5sum

[file

[grep
 Man page is very helpful.

[look
 Simplified "grep".

<fdupes
 Check for duplicate files

## General file manipulation ##
[cp
 '-r' for recursive use.

[ln
 Use like cp.

<lndir
 Creates a symbolic copy of the source directory

[mv

[rm
 '-r' for recursive use.

[touch
 Can change timestamps.

[ispell

[nl
 Numbers lines and can use regular expressions.

[tee
 Will make several files, which '>' cannot do.

[comm

## ASCII file manipulation ##
[vi
 '-b' enables binary mode. '-r' is swp info.

[col

[colrm
 Removes characters after the first of each line, with the first starting at 1.
 "colrm 2 2" removes the second character from each line of standard input.

[column
 '-t' is useful.

[cut
 See http://www.thegeekstuff.com/2013/06/cut-command-examples/

[od
 Prints a file in a special format. (i.e. octal, hex, binary, etc.)

## File merging ##
[join
 Joins the file columns together.
 See http://www.thegeekstuff.com/2012/10/15-linux-split-and-join-command-examples-to-manage-large-files/

[paste
 Appends lines of the same number together.

## File splitting ##
[split

[csplit
 Splits a file by patterns rather than bytes or lines.

## Directory information ##
[df
 Quicker than "du". Run with '-h'.

[du
 Folder by folder. Run with '-hcs' and maybe '-x'.

[ls

## Directory manipulation ##
[mkdir
 '-p' will create parent directories if they don't exist.

[rmdir
 '-p' will remove as much as possible in the given source path.

[pwd (bash built-in), /bin/pwd (*)

[umask

## Misc ASCII manipulation ##
[diff

[expand
 Will put the right number of spaces so that the columns are aligned.

[fmt
 Simple formatting for paragraphs.
 
[par
 Advanced formatting program.

[fold
 Wordwraper.

[head
 Start of the input.

[tail
 End of the input.
 '-F' is very helpful for files which
  will keep expanding, usch as a log.

## Compression ##
<compress -- uncompress
 zcat ("uncompress" but to stout)
 Handles '*.Z' files.

[zip -- unzip
 Handles '*.zip' files.

[gzip -- gunzip
 Under normal circumstances, gzip cannot accept multiple files.
 Handles '*.gz' and '*.tgz' files.

[tar -z
 Handles '*.tgz' and '*.tar.gz' files. Remove the '-z' for '*.tar' files.

<xz
 Handles '*.xz', '*.lzma', '*.txz', and '*.tlz' files.

## System information ##
[w

[who

[date

[find
 Realtime; No index is used.

## System manipulation and management ##
[mknod

## Commandline, execution and process manipulation and information ##
[nice
 Program priority.

[script

## Device manipulation and information ##
[mknod

[lp
 Prints on just the commandline.

[lprm
 Removes a print job from the print que.

[lpq
 Printer que.

[lpr
 Seems like a less complete version of "lp".