Grep

Categories: Linux; Tagged with: Shell; @ May 8th, 2014 21:50

guoliang@GDEV /tmp $ grep ‘hi’ test1.txt
hi
hihihihi

# Display line number
guoliang@GDEV /tmp $ grep -n ‘hi’ test1.txt
3: hi
4:hihihihi

# Count
guoliang@GDEV /tmp $ grep -c ‘hi’ test1.txt
2

# Case insensitive
guoliang@GDEV /tmp $ grep -n -i ‘hi’ test1.txt
1: HI
2: Hi
3: hi
4:hihihihi

# Search the whole word
guoliang@GDEV /tmp $ grep -n -w ‘hi’ test1.txt
3: hi

# Search recursively
guoliang@GDEV /tmp $ grep -n -w ‘hi’ -r test*
test1.txt:3: hi
test3:2:hi

# Use grep in Pipes
GDEV tmp # find . -name ‘test*’ |xargs grep ‘hi’
./test1.txt: hi
./test1.txt:hihihihi
./test2:Hi, this is test2;
./test3:this is test 3
./test3:hi

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