linux - How does cat lt; lt; EOF work in bash? - Stack Overflow The cat <<EOF syntax is very useful when working with multi-line text in Bash, eg when assigning multi-line string to a shell variable, file or a pipe Examples of cat <<EOF syntax usage in Bash:
How does an SSL certificate chain bundle work? - Stack Overflow The original order is in fact backwards Certs should be followed by the issuing cert until the last cert is issued by a known root per IETF's RFC 5246 Section 7 4 2 This is a sequence (chain) of certificates The sender's certificate MUST come first in the list Each following certificate MUST directly certify the one preceding it See also SSL: error:0B080074:x509 certificate routines:X509
How to append output to the end of a text file - Stack Overflow You can use the >> operator This will append data from a command to the end of a text file To test this try running: echo "Hi this is a test" >> textfile txt Do this a couple of times and then run: cat textfile txt You'll see your text has been appended several times to the textfile txt file
Decoding facebooks blob video url - Stack Overflow This method will get the video and its audio AS SEPARATE FILES The downloaded video will have no sound, but you will be able to download its audio file and connect it to the video in some video editing program if you need to In Google Chrome, go to Facebook Open the Chrome Developer Tools (F12) Go to the Network tab in the Developer Tools (it's at the top of the Developer Tools window