It is open-source and it might even use Python. To find out what package installs Software Center: $ apt-file find -F /usr/bin/software-center software-center: /usr/bin/software-center To download the source code: $ mkdir software-center $ cd software-center/ $ apt-get source software-center Look for the word ‘search’ in the source code. utils/search_query.py seems relevant. It looks like it … Read more
use CGI qw(:standard); use File::Basename; my ( $name, $path, $extension) = fileparse ( $productimage, ‘..*’ ); $productimage = $name . $extension; $productimage =~ tr/ /_/; $productimage =~ s/[^$safechars]//g; if ( $productimage =~/^([$safechars]+)$/ ) { $productimage = $1; } else { die “Filename contains invalid characters”; } $fh = upload(‘image’); $uploaddir = “../../.hidden/images”; open ( UPLOADFILE, … Read more
~$ echo one && echo two This runs the 2. command only if the first command succeeds. ~$ echo one ; echo two This always runs the 2. command. ~$ echo one || echo two This runs the 2. command only if the first command fails. A command is considered successful if its exit code … Read more
$ cat tst.awk BEGIN { FS = “[\t|]” } NR==FNR { for (i=1; i<=3; i++) { if ($i == “”) { $i = “N.A.” } } a[$1 OFS $2 OFS $3] next } !(($3 OFS $5 OFS $6) in a) $ awk -f tst.awk file1 file2 123|234|aa|ur29842|b|c|234|567 123|234|aa|ur2909842|bb|ccc|234|567 123|234|aaa|ur29042842|bb|cc|234|567 123|234|N.A.|ur2922|bbb|cccc|234|567 0 solved Remove lines from … Read more
Could you please try following and let me know if this helps you.(I have kept the order of NA at last only let me know if this helps you). Adding a non-one liner form of solution too here. awk ‘ FNR==NR{ a[$1]=$0; next } ($1 in a){ print a[$1],$0; b[$1]; next } { print “NA\t”,$0 … Read more
You have no need to flush the cache from your user-mode (non-kernel-mode) program. The OS (Linux, in the case of ubuntu) provides your application with a fresh virtual address space, with no “leftover stuff” from other programs. Without executing special OS system calls, your program can’t even get to memory that’s used for other applications. … Read more
Because <array> got indirectly included from somewhere and you made the mistake of using namespace std, “array” in ErrorMessage refers to that name in the std namespace. That is a class template, not a type – hence the error message. Outside of value, its array is called value::array. (The typedef value::array array in value is … Read more
The proposal from comments, in pseudocode (turning into C is homework, so I’m not doing that): make P-A pipe make A-B pipe make B-C pipe if fork() // process A while (read can from P-A pipe) do something to can write can to A-B pipe else if fork() // process B while (read can from … Read more
You must fix your usage of the preprocessor as follows: Include a space between #define and its operand. To implement include guards properly, you need a corresponding #ifndef before the #define. As wildplasser said, you can’t use macro names beginning with underscore(s), so remove them, or replace them with some other prefix of your own. … Read more
Assuming your data is in file named “file”: sed -i ‘s/^\(.\{27\}\)\(.\{26\}\)\(.*\)/\1\n\2\n\3/g’ file sed is a very powerful tool for text processing, although not the easiest to use (but very easy when you want to make an example like this). Here is the magic: “-i” is a flag for “do this stuff for me” in single … Read more
To get bind working correctly, there are some rules to follow to get it configured correctly. You need to choose a domain, add the zone record for it, adding only one entry for the hostname inside this zone record, at the top, otherwise all mentions are the domain only. It’s good habit to end all … Read more
All is possible in this way -> to make c++ code which change password I done this: Password must be encrypted, so I used code to make it in $6$:SHA-512 hash. Must open /etc/shadow file, read it, find user by username and change password. There you can read about shadow file structure. To open file … Read more
#!/bin/bash is called the shebang (you missed the leading #). It tells which program will execute your script. clear is for clearing screen. echo outputs following argument to the standard output (your terminal by default). But you must not surround your string with parenthesis as it’s used for grouping command in a sub-shell. If you … Read more
There is also the whiptail command, if you only want to write a shell script (as the debian installer is). There is a good page of it in the Bash Shell Scripting Book on WikiBooks: https://en.wikibooks.org/wiki/Bash_Shell_Scripting/Whiptail solved How to create simple command line UI like the debian installer? [duplicate]
Install Repository wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm rpm -Uvh epel-release-6*.rpm Install vsftpd yum install vsftpd 2 solved Unable to install vsftpd on centos 6 [closed]