Awk can easily detect multi-line combinations of patterns, but you need to create what is called a state machine in your code to recognize the sequence. Consider this input: how second half #1 now first half second half #2 brown second half #3 cow As you have seen, it’s easy to recognize a single pattern. … Read more
Decompile a NASM hello world and understand every byte in it Version of this answer with a nice TOC and more content: http://www.cirosantilli.com/elf-hello-world (hitting the 30k char limit here) Standards ELF is specified by the LSB: core generic: http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/elf-generic.html core AMD64: http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-AMD64/LSB-Core-AMD64/book1.html The LSB basically links to other standards with minor extensions, in particular: generic … Read more
Never for loop over the results of a shell command if you want to process it line by line unless you are changing the value of the internal field separator $IFS to \n. This is because the lines will get subject of word splitting which leads to the actual results you are seeing. Meaning if … Read more
For CentOS and other Red Hat distros, add the umask setting to /etc/sysconfig/httpd and restart apache. [root ~]$ echo “umask 002” >> /etc/sysconfig/httpd [root ~]$ service httpd restart More info: Apache2 umask | MDLog:/sysadmin For Debian and Ubuntu systems, you would similarly edit /etc/apache2/envvars.
Issues were: IPV6 enabled Wrong DNS server Here is how I fixed it: IPV6 Disabling Open Terminal Type su and enter to log in as the super user Enter the root password Type cd /etc/modprobe.d/ to change directory to /etc/modprobe.d/ Type vi disableipv6.conf to create a new file there Press Esc + i to insert … Read more
Putty usually comes with the “plink” utility. This is essentially the “ssh” command line command implemented as a windows .exe. It pretty well documented in the putty manual under “Using the command line tool plink”. You just need to wrap a command like: plink root@myserver /etc/backups/do-backup.sh in a .bat script. You can also use common … Read more
Try this… Run gatttool -b <MAC Address> –interactive like you did before. You’ll get a prompt and then you type connect. You should see a CON in the prompt indicating that you’ve connected to the device. Then type char-read-uuid 2902. You should get a list of all CCC (Client Characteristic Configuration) attributes on the device. … Read more
Beside the use of sudo, note that in 2016, libgnome-keyring is specific to GNOME and is now deprecated (since January 2014, actually). 2022 option: git-credential-manager Microsoft provides a cross-platform credential helper named GCM (Git Credential Manager), which you can install (no need to build it) and configure: git-credential-manager-core configure You will need Git 2.27+ to … Read more
You should have a look at FindBoost.cmake script, which handles Boost detection and setting up all Boost variables. It typically resides in /usr/share/cmake-2.6/Modules/. In it, you will find documentation. For instance: # These last three variables are available also as environment variables: # # BOOST_ROOT or BOOSTROOT The preferred installation prefix for searching for # … Read more
A simple but relatively insecure way would be to use the –net=host option to docker run. This option makes it so that the container uses the networking stack of the host. Then you can connect to services running on the host simply by using “localhost” as the hostname. This is easier to configure because you … Read more