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LinuxShell output command instance

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LinuxShell command output instance-general Linux technology-Linux programming and kernel information. The following is a detailed description. [Root @ root 2009521] # cat shell
Mma7450 0-001d: reg0x00: 000 0x00
Mma7450 0-001d: reg0x01: 000 0x00
Mma7450 0-001d: reg0x02: 000 0x00
Mma7450 0-001d: reg0x03: 000 0x00
Mma7450 0-001d: reg0x04: 000 0x00
Mma7450 0-001d: reg0x05: 000 0x00
Mma7450 0-001d: reg0x06: 000 0x00
Mma7450 0-001d: reg0x07: 000 0x00
Mma7450 0-001d: reg0x08: 000 0x00
Mma7450 0-001d: reg0x09: 000 0x00
Mma7450 0-001d: reg0x0a: 000 0x00

Head command

[Root @ root 2009521] # head-n 4 shell
Mma7450 0-001d: reg0x00: 000 0x00
Mma7450 0-001d: reg0x01: 000 0x00
Mma7450 0-001d: reg0x02: 000 0x00
Mma7450 0-001d: reg0x03: 000 0x00
[Root @ root 2009521] # head-4 shell
Mma7450 0-001d: reg0x00: 000 0x00
Mma7450 0-001d: reg0x01: 000 0x00
Mma7450 0-001d: reg0x02: 000 0x00
Mma7450 0-001d: reg0x03: 000 0x00

Such commands: tail


Use of grep

[Root @ root 2009521] # grep-n 'reg0x0 [0-3] 'shell
1: mma7450 0-001d: reg0x00: 000 0x00
2: mma7450 0-001d: reg0x01: 000 0x00
3: mma7450 0-001d: reg0x02: 000 0x00
4: mma7450 0-001d: reg0x03: 000 0x00


Awk usage

[Root @ root 2009521] # awk '/reg0x0 [0-3]/'Shell
Mma7450 0-001d: reg0x00: 000 0x00
Mma7450 0-001d: reg0x01: 000 0x00
Mma7450 0-001d: reg0x02: 000 0x00
Mma7450 0-001d: reg0x03: 000 0x00

[Root @ root 2009521] # awk '{if ($3 ~ /Reg0x0 [0-3]:/) print $0;} 'Shell
Mma7450 0-001d: reg0x00: 000 0x00
Mma7450 0-001d: reg0x01: 000 0x00
Mma7450 0-001d: reg0x02: 000 0x00
Mma7450 0-001d: reg0x03: 000 0x00

[Root @ root 2009521] # awk '$3 = "reg0x03:" {print $0}' shell
Mma7450 0-001d: reg0x03: 000 0x00

[Root @ root 2009521] # awk '$3 = "reg0x03:"' shell
Mma7450 0-001d: reg0x03: 000 0x00

[Root @ root 2009521] # awk '{if ($3 = "reg0x03:") print $0}' shell
Mma7450 0-001d: reg0x03: 000 0x00

Sed usage

[Root @ root 2009521] # sed-n'1, 4p' shell
Mma7450 0-001d: reg0x00: 000 0x00
Mma7450 0-001d: reg0x01: 000 0x00
Mma7450 0-001d: reg0x02: 000 0x00
Mma7450 0-001d: reg0x03: 000 0x00

[Root @ root 2009521] # sed-n'1, $ P' shell
Mma7450 0-001d: reg0x00: 000 0x00
Mma7450 0-001d: reg0x01: 000 0x00
Mma7450 0-001d: reg0x02: 000 0x00
Mma7450 0-001d: reg0x03: 000 0x00
Mma7450 0-001d: reg0x04: 000 0x00
Mma7450 0-001d: reg0x05: 000 0x00
Mma7450 0-001d: reg0x06: 000 0x00
Mma7450 0-001d: reg0x07: 000 0x00
Mma7450 0-001d: reg0x08: 000 0x00
Mma7450 0-001d: reg0x09: 000 0x00
Mma7450 0-001d: reg0x0a: 000 0x00


[Root @ root 2009521] # sed-n "p" shell
Mma7450 0-001d: reg0x00: 000 0x00
Mma7450 0-001d: reg0x01: 000 0x00
Mma7450 0-001d: reg0x02: 000 0x00
Mma7450 0-001d: reg0x03: 000 0x00


[Root @ root 2009521] # sed-n "1, \ $ p" shell
Mma7450 0-001d: reg0x00: 000 0x00
Mma7450 0-001d: reg0x01: 000 0x00
Mma7450 0-001d: reg0x02: 000 0x00
Mma7450 0-001d: reg0x03: 000 0x00
Mma7450 0-001d: reg0x04: 000 0x00
Mma7450 0-001d: reg0x05: 000 0x00
Mma7450 0-001d: reg0x06: 000 0x00
Mma7450 0-001d: reg0x07: 000 0x00
Mma7450 0-001d: reg0x08: 000 0x00
Mma7450 0-001d: reg0x09: 000 0x00
Mma7450 0-001d: reg0x0a: 000 0x00

[Root @ root 2009521] # sed-n'/reg0x0 [0-3]:/P' shell
Mma7450 0-001d: reg0x00: 000 0x00
Mma7450 0-001d: reg0x01: 000 0x00
Mma7450 0-001d: reg0x02: 000 0x00
Mma7450 0-001d: reg0x03: 000 0x00

[Root @ root 2009521] # sed-n "/reg0x0 [0-3]:/p" shell
Mma7450 0-001d: reg0x00: 000 0x00
Mma7450 0-001d: reg0x01: 000 0x00
Mma7450 0-001d: reg0x02: 000 0x00
Mma7450 0-001d: reg0x03: 000 0x00

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