Docker networking is being promoted as successor – https://docs.docker.com/engine/userguide/networking/ Before the Docker network feature, you could use the Docker link feature to allow containers to discover each other. With the introduction of Docker networks, containers can be discovered by its name automatically. On whether you should stop using them – yes. The docker world is … Read more
You can have a look at net/core/dev.c in the source tree to see what it means: seq_printf(seq, “%6s:%8lu %7lu %4lu %4lu %4lu %5lu %10lu %9lu ” “%8lu %7lu %4lu %4lu %4lu %5lu %7lu %10lu\n”, dev->name, stats->rx_bytes, stats->rx_packets, stats->rx_errors, stats->rx_dropped + stats->rx_missed_errors, stats->rx_fifo_errors, stats->rx_length_errors + stats->rx_over_errors + stats->rx_crc_errors + stats->rx_frame_errors, stats->rx_compressed, stats->multicast, stats->tx_bytes, stats->tx_packets, stats->tx_errors, stats->tx_dropped, … Read more
Memory Fragmentation When a Linux system has been running for a while memory fragmentation can increase which depends heavily on the nature of the applications that are running on it. The more processes allocate and free memory, the quicker memory becomes fragmented. And the kernel may not always be able to defragment enough memory for … Read more
Your shell script did not terminate. It is still running. You are getting a prompt because script is spawning a new shell. the prompt you see is the prompt from the spawned shell. The normal use case for script is something like this: start script. this spawns a new shell. do commands in the new … Read more
This is not a Device Tree syntax issue, you just have to pre-process the .dts file with the C preprocessor, cpp, in order to obtain a file that can be digested by the Device Tree Compiler as is. In your specific case, assuming your current directory would be the kernel root directory, you would have … Read more
You can look at the /proc/<pid>/status file to determine the mapping between the namespace PID and the global PID. For example, if in a docker container I start several sleep 900 processes, like this: # docker run –rm -it alpine sh / # sleep 900 & / # sleep 900 & / # sleep 900 … Read more
You can kill ssh-agent by running: ssh-agent -k !NB, -k argument works only if $SSH_AGENT_PID environment variable is set. eval “$(ssh-agent -s)” sets the variable, but there’re also other methods to start the agent without setting the environment variable. E.g., connecting to a remote server implicitly starts the agent without setting the variable. In this … Read more
The VESA DDC connection is an I2C connection that can be used to query the presence of the monitor. Linux exposes the I2C device and userland programs can communicate directly with the monitor with code such as that at http://jaffar.cs.msu.su/oleg/ddcci/ Notice this below: Control 0xe1: +/1/1 [SAM: Power control (0 – off/1 – on)] # … Read more
You seem to be looking for the –error-exitcode option. Since it defaults to 0, the return code from Valgrind is the same as that of the process. Set it to a non-zero value instead. From Valgrind core manual: –error-exitcode=<number> [default: 0] Specifies an alternative exit code to return if Valgrind reported any errors in the … Read more
Even if traditional Bash arrays are not supported, it may still be possible to create array-like variables using the eval command built into the particular shell. The following example script is based on some scripting I did when using BusyBox in an embedded Linux project. BusyBox uses the Almquist shell (also known as A Shell, … Read more