hxmuller

# apt-mark - mark/unmark a package as bing automatically-installed

apt-mark showauto

hxmuller

apt-mark showmanual > filename

# NOTE: history.log does not capture the entire list of
#       manually installed packages. To get the full list,
#       use the command above. The below is retained for 
#       history.
#
## sed - stream editor for filtering and transforming text
##   -n suppress automatic printing of pattern space
## awk - pattern ascanning and text processing language

hxmuller

# cat - concatenate files and print on the standard output
# xargs - build and execute command lines from standard inpout
# dpkg-query - a tool to query the dpkg database
#   -W list packages matching given pattern, output can be customized
#   -f specifies the format of the output of -W

cat filename | xargs dpkg-query -W -f='${binary:Package}\n\t${binary:Summary}\n'

hxmuller

# sed - stream editor for filtering and transforming text
#   -n suppress automatic printing of pattern space
# cut - remove sections from each line of files
#   -f select only these fields
#   -d use DELIM instead of TAB for field delimiter
# awk - pattern scanning and text processing language

sed -n '/Setting up/p' /var/log/bootstrap.log | cut -f3 -d' ' | awk '!arr[$0]++' > filename

hxmuller

# dpkg - package manager for Debian
#   -V  Verifies the integrity of package-name or all packages if omitted
#
#   The output format:
#   
#   SM5DLUGT c <file>
#   
#   Where:
#   S is the file size.
#   M is the file's mode.

hxmuller

# awk - pattern scanning and text processing language
# a) When the program is omitted, the default is { print $0 }
# b) Each line of filename is read by awk, one at a time.
# c) The line, or record, is stored into the field variable $0.
# d) If an array index consisting of the line is not (!) present
#    in the array, then the line is printed.
# e) The array is incremented (current index added to the array).

awk '!array[$0]++' filename > filename2

hxmuller

# This does not work for packages not installed. '$(which COMMAND)'
# may be replaced with any /path/file. Replace COMMAND with binary
# of interest.
#
# dpkg - package manager for Debian
#   -S Search for a filename from installed packages
# which - locate a command
# awk - process output of previous command
#   gsub(r,s,[t]) - global subsitution, every match of regular expression
#     r in variable t is replaced by string s. If t is omitted, $0 is used.

hxmuller

# modify directory1/ and directory2/ paths as  appropriate
#
# diff - compare files line by line
#   -s report when two files are the same
#   -r recursively compare any subdirectories found
# sed - stream editor for filtering and transforming text
#   -n suppress automatic printing of pattern space
# cut - remove sections from each line of files
#   -f select only these fields
#   -d use DELIM instead of TAB for field delimiter