grep
I know how to grep 2 keywords using 1 command, but I can only manage to color one of them in output . Here is my command:
grep 'keyword1' file.log | grep 'keyword2'
Only keyword2 is highlighted. How can I make keyword1 highlighted at the same time ?
The default behavior is to print the filename when given multiple file arguments - to suppress this, you can add the -h or --no-filename option
From the Output Line Prefix Control section of the grep manual page:
-h, --no-filename
Suppress the prefixing of file names on output. This is the
default when there is only one file (or only standard input) to
search.
Well, vim uses color template files for syntax highlighting. This has nothing to do with the output of grep which uses ANSI escape sequences (the \[033; stuff you mentioned).
My vim doesn't have a style file for syslog and does not color it (I checked both on Debian and on Ubuntu 14.04). If you look at the relevant file on your system, you will find it starts with a regular expression that defines the files to match against. So, if you make your /tmp/fileOUT match that syntax, it should be colored. Don't use --color=always, that will just screw things up.
Alternatively, you could use source-highlight. Install it with sudo apt-get install source-highlight and then run:
sudo tail -n 50 /var/log/syslog | source-highlight --out-format=esc -o STDOUT -s log
The command above will color the last 50 lines of /var/log/syslog:
Best Answer
The
grepcommand accepts a--color=alwaysoption, so you can useAs gertvdijk points out, this command may be inefficient, but it will look for all lines that contain both keyword1 and keyword2. If you want to highlight them in different colors, you can use
which will highlight keyword2 in blue. The
mtpart means thatgrepwill highlight matching text using this CSI code, and01;34means "bold blue foreground on normal background".