Tag Archive for 'bash'

Bash Shell Keyboard shortcuts

The following shortcuts work when using default (Emacs) key bindings. Vi-bindings can be enabled by running set -o vi.

Tab ⇆ : Autocompletes from the cursor position.
Ctrl+a : moves the cursor at the beginning of the line (equivalent to the key Home).
Ctrl+e : (end) moves the cursor at the line end (equivalent to the key End).
Ctrl+p : (previous) recalls the previous command (equivalent to the key ).
Ctrl+n : (next) recalls the next command (equivalent to the key ).
Ctrl+r : (research) recalls the last command including the specified character(s). A second Ctrl+r recalls the next anterior command which corresponds to the research
Ctrl+s : Go back to the next more recent command of the research (beware to not execute it from a terminal because this command also launches its XOFF). If you changed that XOFF setting, use Ctrl+q to return.
Ctrl+o : executes the found command from research.
Ctrl+l : clears the screen content (equivalent to the command clear).
Ctrl+u : clears the line content before the cursor and copy it in the clipboard.
Ctrl+k : clears the line content after the cursor and copy it in the clipboard.
Ctrl+w : clears the word before the cursor and copy it in the clipboard.
Ctrl+y : (yank) adds the clipboard content from the cursor position.
Ctrl+d : sends an EOF marker, which (unless disabled by an option) closes the current shell (equivalent to the command exit).
Ctrl+c : sends the signal SIGINT to the current task, which aborts and closes it.
Ctrl+z : sends the signal SIGTSTP to the current task, which suspends it. To return to it later one can enter fg ‘process name’ (foreground).
Ctrl+x Ctrl+x : (because x has a crossing shape) alternates the cursor with its old position.
Ctrl+x Ctrl+e : (editor because it takes the $EDITOR shell variable) edits the current line in vi.
Alt+f : (forward) moves forward the cursor of one word.
Alt+b : (backward) moves backward the cursor of one word.
Alt+Del : cuts the word before the cursor.
Alt+d : cuts the word after the cursor.
Alt+u : capitalizes every character from the cursor’s position to the end of the current word.
Alt+l : lowers the case of every character from the cursor’s position to the end of the current word.
Alt+c : capitalizes the character under the cursor and moves to the end of the word.
Alt+r : cancels the changes and put back the line as it was in the history.

Download file use bash script and wget

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#!/bin/sh
DOWN_DIR=/home/fred/example.com/upload/
while read line
#c=1
do
#c=`expr $c + 1`
#echo -e "$line \n"
file1=`echo -e $line| awk -F" " '{ print $1 }'`
file2=`echo -e $line| awk -F" " '{ print $2 }'`
dir1=$DOWN_DIR`echo $file2| awk -F"/" '{ print $1"/"$2 }'`
mkdir -p $dir1
wget $file1 -O $DOWN_DIR${file2}.jpg
#if [ $c -lt 3 ];then
#exit
#fi
done < "/home/fred/src/db.txt"