Changing one number in all files using awk

Hi

I want to change the number 70 mentioned in my file to 76 by using awk. I know how to change all same digits but not one particular number.

I have 29 files almost similar to this. One of my files looks like

#Input file for 200K NPT molecular dynamics of final 70%XL made from 58.5% X-Linked EPON:DETDA hardener at 63.6117 Angs final box size (with 100% VDW and interchanged columns)

units real
dimension 3
boundary p p p

atom_style molecular

neighbor 4.0 bin
neigh_modify every 1 delay 0 check yes page 1000000 one 100000

echo screen

#OPLS potentials

bond_style harmonic
angle_style harmonic
dihedral_style opls

pair_style lj/cut/opt 10.0
pair_modify mix arithmetic

read_data DataFile_432isto216_70XLfrom58point5XL_7thmin.xyz

#dynamics commands
#initial velocities

compute 1 all temp
compute 2 all pressure 1
compute 3 all pe
velocity all create 200.0 200.0

#fixes

fix 1 all npt 200.0 200.0 10.0 xyz 1.0 1.0 10.0 drag 2.0

dump EPONDETDA all xyz 100000.0 epon432isto216_70XLfrom58point5XL_dumpNPT_200Kdynamics.xyz

#run

timestep 0.4
thermo 100
thermo_modify lost warn
thermo_style custom step temp pe ke etotal evdwl epair ebond eangle edihed emol press vol

run 500000

Any suggestions?

Hi,

Why don't you try to use sed instead...., like this.

sed �s/70XL/76XL/g� input_file > output_file

BTW - If you have too many files, you can process them with a script using a "for i in " for example.

Thanks,

Marco,

ruby -i.bak -ne 'print if gsub(/70XL/,"76XL")' file

by awk, there is sub or gsub function to do the same job.

awk '{gsub(/70XL/,"76XL")}1' file