Bash command line key bindings

Ctrl + a - Jump to the start of the line
Ctrl + b - Move back a char
Ctrl + c - Terminate the command
Ctrl + d - Delete from under the cursor
Ctrl + e - Jump to the end of the line
Ctrl + f - Move forward a char
Ctrl + k - Delete to EOL
Ctrl + l - Clear the screen
Ctrl + r - Search the history backwards
Ctrl + R - Search the history backwards with multi occurrence
Ctrl + t - swapping of the last two char
Ctrl + u - Delete backward from cursor
Ctrl + xx - Move between EOL and current cursor position
Ctrl + x @ - Show possible hostname completions
Ctrl + z - Suspend/ Stop the command
Ctrl + / - Undo last command-line edit
Ctrl + P - Previous command line
Ctrl + N - Next command line (useful for "scrolling" with Ctrl+P)
Ctrl + H - Backspace

How to iterate through output

# use this below script for iteration thorugh the output

for i in *.tar.gz; do echo working on $i; tar xvzf $i ; done

the above example will extract all tar.gz file in current folder.

How to redirect output to a file and stdout simultaneously

# How to redirect to stdout and a file

grep 2>&1 | tee

e.g.

grep India *.txt 2>&1|tee output.log

How to use find command to find and execute

Find can be clubbed with xargs for finding and executing commands.
e.g.

1. Find log fine in /var and delete them

$ find -path /var -name *.log -exec rm {} \;