find a word from all files excluding 1 directory
You can’t ignore initial search in all directories, but you can remove the files from specified directory after the first step. find . -type f -exec grep -l “port” {} \;| grep -v <dir_name_to exclude>
unix
grep lines that contain 1 character followed by another character
This will find a “b” that is not followed by “e”: $ echo “one be two bring brought” | egrep ‘b[^e]’ Or if perl is available but egrep is not: $ echo “one be two bring brought” | perl -ne ‘print if /b[^e]/;’ And if you want to find lines with “b” not followed by … Read more
What does 2>&1 mean here?
Before talking about redirections i have the feeling that you need to understand a basic thing: Linux commands produce normal output and error output, and unix gives you the freedom to “redirect” each output to a separate “channel” , called file descriptors (fd). Channel/fd 1 is used for std ouput and Channel/fd 2 is used … Read more
how to get the time after two minutes [closed]
To get the date-string in bash: echo “Current: ” $(date +”%Y”-“%m”-“%d”T”%H”-“%M”-“%S”) echo “+2 min : ” $(date –date=”@$(($(date +%s)+120))” +”%Y”-“%m”-“%d”T”%H”-“%M”-“%S”) prints Current: 2014-09-10T15-58-15 +2 min : 2014-09-10T16-00-15 Read the time from string and print +2min string str=”2014-09-10T15-58-15″ new=$(date –date=”@$(($( IFS=”-T” read y m d H M S <<< “$str”;date –date=”$y-$m-${d}T$H:$M:$S” +%s )+120))” +”%Y”-“%m”-“%d”T”%H”-“%M”-“%S”) echo “From … Read more
What do you think about the new Debian release cycle?
“Only” 2 years between 4.0 Etch and 5.0 Lenny is unprecedented in Debian time scale. Version inflation? is it because SPARC-32 support is being dropped? otherwise the changes between 4.0 Etch and Lenny don’t seem bigger than say 3.0 Woody to 3.1 Sarge (3 years apart). In a world where transparent development is normal, “major.minor” … Read more
some problems about c++ try catch [closed]
Exceptions are brutal break of the normal flow of execution. The error correcting flow is to find a catch that correspond to the object thrown; this may lead to several function calls reverse traversal. This is why it needs care to use them, you have two flow of execution : the normal one, and the … Read more
What is the command used to the below question? [closed]
Like this? awk -F, ‘$2<2000{print $1″, “$3}’ sasi Ravi, little stone Sushanth, Menlo park Rocky, columbus Define comma , as the field separator, check that field 2 is numerically smaller than 2000, print the 1st and 3rd field if it is.
Enhancement of unix script [closed]
Bash is not very performant doing loops. Since you tagged the question python, python should be ok? def data_mask(col_val): mod = len(col_val) + sum(map(ord, col_val)) % 10 result = “” for i, ch in enumerate(col_val, mod + 1): absnum = abs(ord(ch) – i) if ‘A’ <= ch <= ‘Z’: ch = chr(ord(‘A’) + absnum % … Read more
Some troubles with using sed and awk [closed]
From what we can discern of this question, you’re attempting to create a programmatic rule to rename files ending in extensions stdout-captured, stderr-captured, and status-captured (assuming one typo) into files ending in extensions stdout-expected, stderr-expected, and status-expected, respectively. Obviously, if each of these definitions is inclusive of exactly one file, a rote mv may be … Read more