Solved sed -i does not work

[bagas]

Hello.
sed -i does not work
How do I delete or replace the same in file?
Linux sed -i '/pass/d' files.txt it work.

 

[bagas]

sed -i '' -e '/pass/d' files.txt In system FreeBSD it work.

 

[Deleted member 65380]

sed -i '' -e 's/this/that/' /the/file.blah

 

[SirDice]

FreeBSD's sed(1) requires an argument to -i. On Linux's sed(1) that argument is optional.

sed -i '' ... works on both Linux and FreeBSD.

 

[bagas]

#!/bin/sh
TM=`date +"%H-%M"`
DOM=`cat /mnt/test_dom`
for f in $DOM
do
        if curl -Is --connect-timeout 5 https://$f 2>/dev/null; then
        else
            echo "Domain "$f" block, time ${TM}." | mail -s "Domain "$f" block, time ${TM}." [EMAIL]local@mail.local[/EMAIL]
            sed -i '/$f/d' /mnt/test_dom
        fi
done
exit 0

Sed does not work.
Domain is not removed from the list (/mnt/test_dom).

 

[zirias@]

maybe you should read sed(1)'s manpage. I can assure you, it does work.

 

[bagas]

maybe you should read sed(1)'s manpage. I can assure you, it does work.

in a loop does not work.
If you run the command separately. then it works.

 

[zirias@]

Nope, your syntax is still wrong. The examples given in this thread are correct. But to understand what the (required) parameter to -i does, just read the manpage. That's what theses pages are written for…

 

[bagas]

Nope, your syntax is still wrong. The examples given in this thread are correct. But to understand what the (required) parameter to -i does, just read the manpage. That's what theses pages are written for…

The old script was mistaken.
sed -i '' -e '/$f/d' /root/test_dom
I don’t understand why it doesn’t work

 

[SirDice]

The $f variable is in single quotes, thus it's not getting expanded but taken verbatim. There is a difference between "$f" and '$f':

#!/bin/sh

FOO="bar"
echo "$FOO"
echo '$FOO'

This is shell scripting 101.

UNIX Shell Quotes - a simple tutorial

 

[bagas]

The $f variable is in single quotes, thus it's not getting expanded but taken verbatim. There is a difference between "$f" and '$f':

#!/bin/sh

FOO="bar"
echo "$FOO"
echo '$FOO'

This is shell scripting 101.

UNIX Shell Quotes - a simple tutorial

sed -i '' -e "/$f/d" /root/test_dom WORK!
Thank you, kind man.

 

[Erichans]

[...] This is shell scripting 101.

UNIX Shell Quotes - a simple tutorial

Small addition:
As the script is a sh script and the FreeBSD sh is very close to a conformant POSIX shell, perhaps the most specific explanation from the Grymoire, including weak versus strong quoting, and other sh specifics is: Quoting within the Shell

Other shells have (subtle) differences in quoting, as detailed in the referenced

UNIX Shell Quotes - a simple tutorial

 

[chrbr]

In my opinion it is misleading to have the words "quoting" and "simple" in one sentence . From my perspective users who have no issues with quoting have reached the status of a guru. At least.

 

[Deleted member 65380]

In my opinion it is misleading to have the words "quoting" and "simple" in one sentence .

Simple sentence quoting.