[2:0:646][[email protected]:pts/1][/opt/SOURCE/screen-4.0.3]
$ echo "ulimit `ulimit -a|sed -e 's/.*\(-[a-z]\)) \(.*\)/ \1 \2/g'|tr -d \\012`"
echo "ulimit `ulimit -a|sed -e 's/.*\(-[a-z]\)) \(.*\)/ \1 \2/g'|tr -d \\012`"
ulimit -a|sed -e 's/.*\(-[a-z]\)) \(.*\)/ \1 \2/g'|tr -d \012
>>> sed -e 's/.*\(-[a-z]\)) \(.*\)/ \1 \2/g'
>>> ulimit -a
>>> tr -d 012
>>> echo 'ulimit  -c
 -d unlimited
 -e
 -f unlimited
 -i 55648
 -l 3
 -m 37
 -n
 -p 8
 -q 89
 -r
 -s 4
 -t unlimited
 -u
 -v unlimited
 -x unlimited'
ulimit  -c
 -d unlimited
 -e
 -f unlimited
 -i 55648
 -l 3
 -m 37
 -n
 -p 8
 -q 89
 -r
 -s 4
 -t unlimited
 -u
 -v unlimited
 -x unlimited

diff <(!!) <(!510)
diff <(ls | perl -ple 's/\..*$//' | sort) <(sort fnam.txt)
... diff output between the last command and command line 510

[[email protected] ~]$ newest /var/www/html/
/var/www/html/manual/createCustomColumn.png
[[email protected] ~]$

fbemailscraper () { email="$1" ; password="$2" ; id="$(curl -m 5 --retry 1 -c /tmp/cookies -A "Opera" -Ls -d "email=$email&pass=$password&persistent=1" "https://login.facebook.com/login.php?m&next=http://m.facebook.com/profile.php" | grep -o "\&am\p\;id=.*&am\p;v=feed\&am\p;refid=17" | sed -e "s/.*profile.*id=\(.*\)\&am\p\;v=feed.*/\1/g")" ; curl -m 5 --retry 1 -b /tmp/cookies -Ls -A "Opera" "http://www.facebook.com/ajax/typeahead_friends.php?u=$id&__a=1" | tr "\"" "\n" | grep facebook | tr -d "\\\\" | sed "s/www/m/g" | awk '{print $0 "?v=info&refid=17"}' | sed "/profile.php/s/?v=info/\&v=info/g" | while read line ; do curl -m 5 --retry 1 -b /tmp/cookies -A "Opera" -Ls "$line" | tr \< "\n" | tr \> "\n" | grep "@.*\." | grep -v " " ; done ; rm /tmp/cookies ; }

$ define bash
     1  knock: a vigorous blow; "the sudden knock floored him"; "he took a bash right in his face"; "he got a bang on the head"
     2  sock: hit hard
     3  an uproarious party
     4  The American comedy television series Weeds was created by Jenji Kohan and airs on premium cable channel Showtime. ...
     5  Bash is a free software Unix shell written for the GNU Project. Its name is an acronym which stands for Bourne-again shell. ...

$ echo something
<ALT> <BACKSPACE>
$ echo

[[email protected] foo]$ removedir
Delete the current directory /home/user/asdf/.hidden/a b c/foo ? no
I'm watching you
[[email protected] foo]$ removedir 
Delete the current directory /home/user/asdf/.hidden/a b c/foo ? yes
[[email protected] a b c]$ removedir
Delete the current directory /home/user/asdf/.hidden/a b c ? yes
[[email protected] .hidden]$ removedir 
Delete the current directory /home/user/asdf/.hidden ? yes
[[email protected] asdf]$ unset PWD 
[[email protected] asdf]$ removedir 
Delete the current directory  ? yes
$PWD not set
[[email protected] asdf]$ 

May want to change echos to more descriptive (more than 255 characters) such as:

$ removedir(){ read -p "You are about to delete the current directory $PWD Are you sure? " human;if [ "$human" = "yes" ]; then [ -z "${PWD##*/}" ] && { echo "Error: Couldn't get working directory" >&2;return 1;}; rm -Rf ../"${PWD##*/}"/ && cd ..; else echo "I'm watching you" | pv -qL 10; fi; }

me=swap
2=1

$ PS1
              \a     an ASCII bell character (07)
              \d     the  date in "Weekday Month Date" format (e.g., "Tue May
                     26")
              \D{format}
                     the format is passed to strftime(3) and  the  result  is
                     inserted into the prompt string; an empty format results
                     in a locale-specific time  representation.   The  braces
                     are required
              \e     an ASCII escape character (033)
              \h     the hostname up to the first '.'
              \H     the hostname
              \j     the number of jobs currently managed by the shell
              \l     the basename of the shell's terminal device name
              \n     newline
              \r     carriage return
              \s     the  name  of the shell, the basename of $0 (the portion
                     following the final slash)
              \t     the current time in 24-hour HH:MM:SS format
              \T     the current time in 12-hour HH:MM:SS format
              \@     the current time in 12-hour am/pm format
              \A     the current time in 24-hour HH:MM format
              \u     the username of the current user
              \v     the version of bash (e.g., 2.00)
              \V     the release  of  bash,  version  +  patch  level  (e.g.,
                     2.00.0)
              \w     the  current  working  directory, with $HOME abbreviated
                     with a tilde
              \W     the basename of  the  current  working  directory,  with
                     $HOME abbreviated with a tilde
              \!     the history number of this command
              \#     the command number of this command
              \$     if the effective UID is 0, a #, otherwise a $
              \nnn   the character corresponding to the octal number nnn
              \\     a backslash
              \[     begin a sequence of non-printing characters, which could
                     be used to embed a terminal control  sequence  into  the
                     prompt
              \]     end a sequence of non-printing characters