deleting a pattern from a file

lassimanji · April 30, 2009, 5:46pm

say i have a file with the following contents

0x20
0x20
0xc23886
> 0xc12354
> 0xc567555555

i want to delete "> " pattern and keep the rest of the file

ldapswandog · April 30, 2009, 5:55pm

You can use sed to trim the unwanted characters.

sed -i 's/^> //' file
# -i overwrite file with new content
# s/^> //'  substitute begin of line "^", greaterthan ">", {space} with nothing.

vgersh99 · April 30, 2009, 5:59pm

printf '1,$s/^>//\n.\nwq' |ex - myFile

lassimanji · April 30, 2009, 6:00pm

thanks

vgersh99 · April 30, 2009, 6:02pm

ldapswandog:

You can use sed to trim the unwanted characters.

sed -i 's/^> //' file
# -i overwrite file with new content
# s/^> //'  substitute begin of line "^", greaterthan ">", {space} with nothing.

This is GNU-ism (not that there's anything wrong with that....[(c)Seinfeld])

lassimanji · April 30, 2009, 6:49pm

0xc0a80101
0xc0a80108
0xc0a80129
0x20
0xc0a80201
0xc0a80201
0xc0a80201
0xc0a80201
0xc0a80202
0xc0a80201
0xc0a80202
0xc0a80201
0x20

I want to sort this file.
The command that i am using is sort -u diff1.txt | tee diff1.txt
but diff1.txt is always empty.
what am I doing wrong

vgersh99 · April 30, 2009, 7:04pm

you cannot 'tee' to the same file you're sort-ing.

sort -u diff1.txt | tee diff1_sorted.txt