![]() This is the case of ls and grep: By using the –color=always option, those programs will produce the necessary escape codes even when they write to a pipe. When facing such situations, the first thing we should do is to check if the program feeding tail allows us to enable colors even when writing to a pipe. ![]() To do so, type the following: history tail -n 10. You can achieve the same result if you pipe history through the tail command. For example, to see the last 10 commands you’ve used, type the following: history 10. However, when piping the content to programs intended to produce a visual output at the terminal, we actually need those escape characters. The developer of logtail has not made the repository available via yum for quick installation. To see a certain number of commands, you can pass a number to history on the command line. Other great apps like Logtail are Kibana, Sentry, Graylog and Logstash. The best alternative is Grafana, which is both free and Open Source. Such default behavior is usually desirable. There are more than 10 alternatives to Logtail for a variety of platforms, including Online / Web-based, Linux, Mac, Windows and Self-Hosted solutions. By doing so, they produce no color-related escape characters, making the output cleaner, which is more appropriate, for instance, to store the contents in a file. When that’s the case, they produce a monochromatic output. By default, many commands detect when they’re writing to a pipe. Specifically, let’s consider what happens when tail gets its input through a pipe: $ | tailĬolors in the terminal are produced by using escape characters. Firstly, let’s talk about how some commands behave when they have their outputs piped to another program.
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