sed remove characters after match code example

Example 1: bash remove everything after character x

echo "Hello: world" | cut -f1 -d":"

Example 2: sed remove line after match

Use d option at the end of sed command string for deleting line of matches.
sed -i "" "s/matching_pattern/,+1 d" file.txt #+1 defines number of lines
# to delete after matching line

Example 3: sed delete line before match

Use d option at the end of sed command string for deleting line of matches.
tac | sed -i "" "s/matching_pattern/I+1 d" file.txt | tac #

Example 4: delete strings after match to eol using sed command

# You can use awk's field separator (-F) following way:
$ cat file
google.com/funny
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isuckatunix.com/ireallydo

Example 5: delete strings after match to eol using sed command

# To explicitly delete everything that comes after ".com", just tweak your existing sed solution to replace ".com(anything)" with ".com":
sed 's/\.com.*/.com/' file.txt

Example 6: delete strings after match to eol using sed command

$ cat file | awk -F '\\.com' '{print $1".com"}'
google.com
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isuckatunix.com