I’m learning in Linux and my senior give me a task that I find a word in a syslog through AWK command where that all the details of that word showing. I check out google and but there is not a single command I found which is helpful.
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Answer
You can use below commands
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dmesg | awk ' /pattern/ {print}'awk '/pattern/ {print}' /var/log/syslogSome examples.
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$ awk '/kernel/ {print}' /var/log/syslogNov 5 10:36:01 HardwareTestPC kernel: [135368.195103] codelite-make[29069]: segfault at 0 ip 00007fd7360cca1b sp 00007ffcb98617e0 error 4 in libc-2.27.so[7fd735f99000+1e7000]Nov 5 10:36:02 HardwareTestPC kernel: [135368.682625] codelite-make[29149]: segfault at 0 ip 00007fd7360cca1b sp 00007ffcb98611d0 error 4 in libc-2.27.so[7fd735f99000+1e7000]Nov 5 10:40:01 HardwareTestPC kernel: [135608.437387] codelite-make[11438]: segfault at 0 ip 00007f5b9770fa1b sp 00007ffd774678b0 error 4 in libc-2.27.so[7f5b975dc000+1e7000]Nov 5 10:40:02 HardwareTestPC kernel: [135608.695397] codelite-make[11474]: segfault at 0 ip 00007f5b9770fa1b sp 00007ffd774672a0 error 4 in libc-2.27.so[7f5b975dc000+1e7000]Nov 5 10:47:59 HardwareTestPC kernel: [136086.395728] codelite-make[7425]: segfault at 0 ip 00007fb8bc720a1b sp 00007ffe65c356c0 error 4 in libc-2.27.so[7fb8bc5ed000+1e7000]Nov 5 10:48:00 HardwareTestPC kernel: [136086.674097] codelite-make[7460]: segfault at 0 ip 00007fb8bc720a1b sp 00007ffe65c350b0 error 4 in libc-2.27.so[7fb8bc5ed000+1e7000]You can specify fields to print as well. awk command splits the line into fields (addressable by $1 to $NF) using space as delimiter.
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$ awk '/kernel/ {print $2, $3, $4}' /var/log/syslog5 10:36:01 HardwareTestPC5 10:36:02 HardwareTestPC5 10:40:01 HardwareTestPC5 10:40:02 HardwareTestPC5 10:47:59 HardwareTestPC5 10:48:00 HardwareTestPC5 10:57:13 HardwareTestPC5 10:59:46 HardwareTestPC5 11:04:30 HardwareTestPC5 11:04:30 HardwareTestPC5 11:04:42 HardwareTestPC5 11:04:42 HardwareTestPC