[TriLUG] grep'ing for multiple targets

[Engle, Victor]

> 
> I need to grep for a couple of targets in a file eg in /proc/meminfo
> 
> MemTotal:     772571936 kB
> MemFree:      291853936 kB
> Buffers:        125296 kB

How about egrep...

egrep 'MemTotal|MemFree|Buffers|Cached|SwapTotal|SwapFree'
/proc/meminfo

Regards,
Vic


> -----Original Message-----
> From: Joseph Mack NA3T [mailto:jmack at wm7d.net] 
> Sent: Friday, October 26, 2007 9:22 AM
> To: trilug at trilug.org
> Subject: [TriLUG] grep'ing for multiple targets
> 
> I need to grep for a couple of targets in a file eg in /proc/meminfo
> 
> MemTotal:     772571936 kB
> MemFree:      291853936 kB
> Buffers:        125296 kB
> Cached:       378449152 kB
> SwapCached:     211888 kB
> Active:       324410928 kB
> Inactive:     145250592 kB
> HighTotal:           0 kB
> HighFree:            0 kB
> LowTotal:     772571936 kB
> LowFree:      291853936 kB
> SwapTotal:    303183680 kB
> SwapFree:     302166128 kB
> Dirty:        15505472 kB
> Writeback:       32800 kB
> Mapped:       89034896 kB
> Slab:          8205376 kB
> CommitLimit:  689469648 kB
> Committed_AS: 108303456 kB
> PageTables:     135984 kB
> VmallocTotal: 137080408512 kB
> VmallocUsed:   1971280 kB
> VmallocChunk: 137078436112 kB
> HugePages_Total:     0
> HugePages_Free:      0
> HugePages_Rsvd:      0
> Hugepagesize:    262144 kB
> 
> I'd like to retreive say MemTotal, MemFree, Buffers, Cached, 
> SwapTotal, SwapFree.
> 
> I'd like to do this in one pass (rather than 6 passes). 
> Currently I do something like
> 
> awk '{print $2}' | xargs | awk '{print $1 ..linenumber_of_variable }'
> 
> It turns out that the position in this list of a variable 
> (say SwapTotal) varies for different 2.6 kernels, so I can't 
> look for a variable by position (unless I have a case 
> statement for each kernel).
> 
> Is there a way to retrieve the lines with the above variables 
> in one pass?
> 
> Thanks Joe
> 
> --
> Joseph Mack NA3T EME(B,D), FM05lw North Carolina jmack (at) 
> wm7d (dot) net - azimuthal equidistant map generator at 
> http://www.wm7d.net/azproj.shtml Homepage 
> http://www.austintek.com/ It's GNU/Linux!
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