linux - Use grep to search for words beginning with letter "s" -

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i'm trying use grep through file, , find words starting lowercase letter "s". snippet of file:

sjpope   pts/2    161.133.12.95    10:21am 43.00s  0.13s  0.01s  man bc rmschalk pts/3    161.133.9.147    10:22am  1.00s  0.10s  0.02s  vi testb jntrudel pts/4    161.133.9.11     10:23am  2.00s  0.09s  0.00s  vi testb tjbanks  pts/5    161.133.9.70     10:41am  8.00s  0.06s  0.04s  -ksh

i want output have line stating "s".

for these want search words starting given letter not lines one-liner do:

grep -e '\bs' file.txt # words starting s grep -e 's\b' file.txt # words ending s

i know non standard grep behavior (\b regex anchor means word break not in extended regular expressions standard) works on modern systems.


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