A: use 'killall' command.
Q: Where is the core dumps ?
A: [Ubuntu12.04] /var/crash/
Q: How to pause (suspend) / resume current process ?
A: To pause (suspend) current process, press CTRL+Z
To resume it, use 'fg' command.
Q: How to show time (including year) of a file ?
A: ls --full-time
Q: How to show a file's creation time ?
A: stat
Q: How to update hardware time ?
A: "ntpdate pool.ntp.org" or "date --set "5 Aug 2012 12:54 IST"
and "hwclock --systohc --localtime"
Q: Find line number of a specific text.
A: grep -nr 04:07: top_log
grep -n -E 'WNC|null pointer' tsu_all_20210202 > tsu_all_20210202.refine1
grep -v -E 'convertWNCsignalStrengthToRIL|SIGNAL_STRENGTH' tsu_all_20210202.refine1 > tsu_all_20210202.refine2
grep -n -E 'null pointer|Data Connection ESTABLISHED' tsu_all_20210202 > tsu_all_20210202.refine3
grep -n -E 'null pointer|SIGNAL_STRENGTH' tsu_all_20210202 > tsu_all_20210202.refine4
# Truncate the file in-place starting a certain line.
sed -i '50001,$ d' filename
grep -v -E 'convertWNCsignalStrengthToRIL|SIGNAL_STRENGTH' tsu_all_20210202.refine1 > tsu_all_20210202.refine2
grep -n -E 'null pointer|Data Connection ESTABLISHED' tsu_all_20210202 > tsu_all_20210202.refine3
grep -n -E 'null pointer|SIGNAL_STRENGTH' tsu_all_20210202 > tsu_all_20210202.refine4
# Truncate the file in-place starting a certain line.
sed -i '50001,$ d' filename
- -i means in place.
- d means delete.
- 50001,$ means the lines from 50001 to the end.
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