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
linux - Retrieve last 100 lines logs - Stack Overflow I need to retrieve last 100 lines of logs from the log file I tried the sed command sed -n -e '100,$p' logfilename Please let me know how can I change this command
How to get the CUDA version? - Stack Overflow Is there any quick command or script to check for the version of CUDA installed? I found the manual of 4 0 under the installation directory but I'm not sure whether it is of the actual installed v
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
How to get . pem file from . key and . crt files? - Stack Overflow If this is for a Web server and you cannot specify loading a separate private and public key: You may need to concatenate the two files For this use: cat server crt server key > server includesprivatekey pem I would recommend naming files with "includesprivatekey" to help you manage the permissions you keep with this file
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
Windows batch - concatenate multiple text files into one 2 cat "input files" > "output files" This works in PowerShell, which is the Windows preferred shell in current Windows versions, therefore it works It is also the only version of the answers above to work with large files, where 'type' or 'copy' fails
git - How do I access my SSH public key? - Stack Overflow On terminal cat ~ ssh id_rsa pub explanation cat is a standard Unix utility that reads files and prints output ~ Is your Home User path ssh - your hidden directory contains all your ssh certificates id_rsa pub OR id_dsa pub are RSA public keys, (the private key located on the client machine) the primary key for example can be used to enable cloning project from remote repository securely