sed GNU: sed -i ‘$a\’ *.txt OS X: sed -i ” ‘$a\’ *.txt $ addresses the last line. a\ is the append function. OS X’s sed sed -i ” -n p *.txt -n disables printing and p prints the pattern space. p adds a missing newline in OS X’s sed but not in GNU sed, … Read more
It took a little doing, but here: sed -i.bkup ‘s/\[\([^]]*\)\]/\\macro{\1}/g’ test.txt Let’s see if I can explain this regular expression: The \[ is matching a square bracket. Since [ is a valid magic regular expression character, the backslash means to match the literal character. The \(…\) is a capture group. It captures the part of … Read more
Using sed and the pattern described: sed ‘/192.168.1.2/s/$/ myalias/’ file Using sed and a specific line number: sed ‘2s/$/ myalias/’ file
Looks like you are on BSD or Solaris. Try this: [jaypal:~/Temp] echo ‘abc’ | sed ‘s/b/\ > /’ a c Add a black slash and hit enter and complete your sed statement.
If you’re worried about starting two sed processes in a pipeline for performance reasons, you probably shouldn’t be, it’s still very efficient. But based on your comment that you want to do in-place editing, you can still do that with distinct commands (sed commands rather than invocations of sed itself). You can either use multiple … Read more
How about something like this? Change 20 is the number of characters before the newline, and temp.text is the file to replace in.. sed -e “s/.\{20\}/&\n/g” < temp.txt
The asterisk (*) means “zero or more of the previous item”. If you want to match any single character use sed -i ‘s/string-./string-0/g’ file.txt If you want to match any string (i.e. any single character zero or more times) use sed -i ‘s/string-.*/string-0/g’ file.txt
One way: Sample file $ cat file Cygwin Unix Linux Solaris AIX Using sed, replacing the next line after the pattern ‘Unix’ with ‘hi’: $ sed ‘/Unix/{n;s/.*/hi/}’ file Cygwin Unix hi Solaris AIX For your specific question: $ sed ‘/<key>ConnectionString<\/key>/{n;s/<string>.*<\/string>/<string>NEW STRING<\/string>/}’ your_file <key>ConnectionString</key> <string>NEW STRING</string>
tr ‘ ‘ ‘,’ <input >output Substitutes each space with a comma, if you need you can make a pass with the -s flag (squeeze repeats), that replaces each input sequence of a repeated character that is listed in SET1 (the blank space) with a single occurrence of that character. Use of squeeze repeats used … Read more
You can cascade greps with different colors by specifying –color=always and using the regular expression ‘foo|$’ to pass all lines. For example: tail -f myfwlog | GREP_COLOR=’01;36′ egrep –color=always ‘ssh|$’ | GREP_COLOR=’01;31′ egrep -i –color=always ‘drop|deny|$’ If you want the entire line to be highlighted, update your regular expression accordingly: …. GREP_COLOR=’01;31′ egrep -i –color=always … Read more