I think the error occurs if the input encoding of the file is different from the preferred encoding of your environment. Example: in is UTF-8 $ LANG=de_DE.UTF-8 sed ‘s/.*| //’ < in X Y $ LANG=de_DE.iso88591 sed ‘s/.*| //’ < in X Y UTF-8 can safely be interpreted as ISO-8859-1, you’ll get strange characters but … Read more
From source code, -E is an undocumented option for compatibility with BSD sed. /* Undocumented, for compatibility with BSD sed. */ case ‘E’: case ‘r’: if (extended_regexp_flags) usage(4); extended_regexp_flags = REG_EXTENDED; break; And from manual, -E in BSD sed is used to support extended regular expressions.
Escape the .: sed ‘s/foo\./foo_/g’ file.php Example: ~$ cat test.txt foo.bar ~$ sed ‘s/foo\./foo_/g’ test.txt foo_bar
You can use the -i flag which makes your pattern case insensitive: grep -iF “success…” file1 Also, there is no need for cat. grep takes a file with the syntax grep <pattern> <file>. I also used the -F flag to search for a fixed string to avoid escaping the ellipsis.
With a regex and Parameter Expansion: for i in *; do [[ $i =~ [0-9]{8}|[0-9]{4}-[0-9]{2}-[0-9]{2} ]] x=”${BASH_REMATCH[0]//-/}” y=”${x:0:4}” m=”${x:4:2}” d=”${x:6:2}” echo “$y $m $d” done | sort -n Output: 2010 12 20 2016 01 01 2016 04 13 2017 01 11
What about the following: awk -F, ‘(NR==FNR){a[$1];next}!($1 in a)’ blacklist.csv candidates.csv How does this work? An awk program is a series of pattern-action pairs, written as: condition { action } condition { action } … where condition is typically an expression and action a series of commands. Here, the first condition-action pairs read: (NR==FNR){a[$1];next} if … Read more
mv $filname $(echo $filename | sed -e ‘s/…..\.moc1$//’); or echo ${filename%%?????.moc1}.moc1 %% is a bash internal operator…
It’s easy to use Python to delete the DOS EOF chars; for example, def delete_eof(fin, fout): BUFSIZE = 2**15 EOFCHAR = chr(26) data = fin.read(BUFSIZE) while data: fout.write(data.translate(None, EOFCHAR)) data = fin.read(BUFSIZE) import sys ipath = sys.argv[1] opath = ipath + “.new” with open(ipath, “rb”) as fin, open(opath, “wb”) as fout: delete_eof(fin, fout) That takes … Read more
So, you don’t really want to be doing this with awk. Any of the popular high-level scripting languages — Perl, Python, Ruby, etc. — would do this in a way that was simpler and more robust. Having said that, something like this will work. Given input like this: this is a test (E.g., a row … Read more
awk -F, ‘NR > 1 { print $3 “,” $4 “,” $5 }’ NR is the current line number, while $3, $4 and $5 are the fields separated by the string given to -F