diff --git a/src/ASPHERE/Install.sh b/src/ASPHERE/Install.sh
index a7cdec817e..ccb5f781cb 100644
--- a/src/ASPHERE/Install.sh
+++ b/src/ASPHERE/Install.sh
@@ -3,7 +3,7 @@
 #   so it will remove GPU files that depend on ASPHERE files,
 #   then replace others
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp atom_vec_ellipsoid.cpp ..
   cp compute_erotate_asphere.cpp ..
@@ -23,7 +23,7 @@ if (test $1 == 1) then
   cp pair_gayberne.h ..
   cp pair_resquared.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../atom_vec_ellipsoid.cpp
   rm ../compute_erotate_asphere.cpp
diff --git a/src/CLASS2/Install.sh b/src/CLASS2/Install.sh
index 28edbb91d0..d59abf3d23 100644
--- a/src/CLASS2/Install.sh
+++ b/src/CLASS2/Install.sh
@@ -1,6 +1,6 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp bond_class2.cpp ..
   cp angle_class2.cpp ..
@@ -20,7 +20,7 @@ if (test $1 == 1) then
   cp pair_lj_class2_coul_cut.h ..
   cp pair_lj_class2_coul_long.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../bond_class2.cpp
   rm ../angle_class2.cpp
diff --git a/src/COLLOID/Install.sh b/src/COLLOID/Install.sh
index d98ad7efdb..36edc72b7e 100644
--- a/src/COLLOID/Install.sh
+++ b/src/COLLOID/Install.sh
@@ -1,6 +1,6 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp atom_vec_colloid.cpp ..
   cp fix_wall_colloid.cpp ..
@@ -14,7 +14,7 @@ if (test $1 == 1) then
   cp pair_lubricate.h ..
   cp pair_yukawa_colloid.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../atom_vec_colloid.cpp
   rm ../fix_wall_colloid.cpp
diff --git a/src/DIPOLE/Install.sh b/src/DIPOLE/Install.sh
index 84d345b128..1006e070f2 100644
--- a/src/DIPOLE/Install.sh
+++ b/src/DIPOLE/Install.sh
@@ -1,6 +1,6 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp atom_vec_dipole.cpp ..
   cp pair_dipole_cut.cpp ..
@@ -8,7 +8,7 @@ if (test $1 == 1) then
   cp atom_vec_dipole.h ..
   cp pair_dipole_cut.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../atom_vec_dipole.cpp
   rm ../pair_dipole_cut.cpp
diff --git a/src/DSMC/Install.sh b/src/DSMC/Install.sh
index cf2938fe58..a527251360 100644
--- a/src/DSMC/Install.sh
+++ b/src/DSMC/Install.sh
@@ -1,12 +1,12 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp pair_dsmc.cpp ..
 
   cp pair_dsmc.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../pair_dsmc.cpp
 
diff --git a/src/GPU/Install.sh b/src/GPU/Install.sh
index 77e149a90a..0c9c8c3b92 100644
--- a/src/GPU/Install.sh
+++ b/src/GPU/Install.sh
@@ -2,7 +2,7 @@
 # edit Makefile.package to include/exclude GPU library
 # do not copy gayberne files if non-GPU version does not exist
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   sed -i -e 's/[^ \t]*gpu //' ../Makefile.package
   sed -i -e 's/[^ \t]*gpu_[^ \t]*) //' ../Makefile.package
@@ -19,7 +19,7 @@ if (test $1 == 1) then
   cp pair_lj_cut_gpu.cpp ..
   cp pair_lj_cut_gpu.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   sed -i -e 's/[^ \t]*gpu //' ../Makefile.package
   sed -i -e 's/[^ \t]*gpu_[^ \t]*) //' ../Makefile.package
diff --git a/src/GRANULAR/Install.sh b/src/GRANULAR/Install.sh
index 6a6bc8fa98..0b8c3bf00a 100644
--- a/src/GRANULAR/Install.sh
+++ b/src/GRANULAR/Install.sh
@@ -1,6 +1,6 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp atom_vec_granular.cpp ..
   cp fix_freeze.cpp ..
@@ -18,7 +18,7 @@ if (test $1 == 1) then
   cp pair_gran_hooke.h ..
   cp pair_gran_hooke_history.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../atom_vec_granular.cpp
   rm ../fix_freeze.cpp
diff --git a/src/KSPACE/Install.sh b/src/KSPACE/Install.sh
index a0db8dbc38..efecdf33f8 100644
--- a/src/KSPACE/Install.sh
+++ b/src/KSPACE/Install.sh
@@ -3,7 +3,7 @@
 #   so it will remove OPT files that depend on KSPACE files,
 #   then replace others
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp ewald.cpp ..
   cp pppm.cpp ..
@@ -33,7 +33,7 @@ if (test $1 == 1) then
   cp remap.h ..
   cp remap_wrap.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../ewald.cpp
   rm ../pppm.cpp
diff --git a/src/MANYBODY/Install.sh b/src/MANYBODY/Install.sh
index 689d8207d7..0aadb74033 100644
--- a/src/MANYBODY/Install.sh
+++ b/src/MANYBODY/Install.sh
@@ -3,7 +3,7 @@
 #   so it will remove OPT files that depend on MANYBODY files,
 #   then replace others
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp pair_airebo.cpp ..
   cp pair_eam.cpp ..
@@ -21,7 +21,7 @@ if (test $1 == 1) then
   cp pair_tersoff.h ..
   cp pair_tersoff_zbl.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../pair_airebo.cpp
   rm ../pair_eam.cpp
diff --git a/src/MEAM/Install.sh b/src/MEAM/Install.sh
index b23b5c7167..b5e2ba8db6 100644
--- a/src/MEAM/Install.sh
+++ b/src/MEAM/Install.sh
@@ -1,7 +1,7 @@
 # Install/unInstall package files in LAMMPS
 # edit Makefile.package to include/exclude MEAM library
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   sed -i -e 's/[^ \t]*meam //' ../Makefile.package
   sed -i -e 's/[^ \t]*meam_[^ \t]*) //' ../Makefile.package
@@ -15,7 +15,7 @@ if (test $1 == 1) then
 
   cp pair_meam.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   sed -i -e 's/[^ \t]*meam //' ../Makefile.package
   sed -i -e 's/[^ \t]*meam_[^ \t]*) //' ../Makefile.package
diff --git a/src/MOLECULE/Install.sh b/src/MOLECULE/Install.sh
index 909b7aaf00..b21bdc6b8d 100644
--- a/src/MOLECULE/Install.sh
+++ b/src/MOLECULE/Install.sh
@@ -1,6 +1,6 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp angle_charmm.cpp ..
   cp angle_cosine.cpp ..
@@ -68,7 +68,7 @@ if (test $1 == 1) then
   cp pair_lj_charmm_coul_charmm.h ..
   cp pair_lj_charmm_coul_charmm_implicit.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../angle_charmm.cpp
   rm ../angle_cosine.cpp
diff --git a/src/OPT/Install.sh b/src/OPT/Install.sh
index ad35a1bf6e..4b12d0396a 100644
--- a/src/OPT/Install.sh
+++ b/src/OPT/Install.sh
@@ -1,7 +1,7 @@
 # Install/unInstall package files in LAMMPS
 # do not copy eam and charmm files if non-OPT versions do not exist
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   if (test -e ../pair_eam.cpp) then
     cp pair_eam_opt.cpp ..
@@ -23,7 +23,7 @@ if (test $1 == 1) then
   cp pair_morse_opt.cpp ..
   cp pair_morse_opt.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../pair_eam_opt.cpp
   rm ../pair_eam_alloy_opt.cpp
diff --git a/src/PERI/Install.sh b/src/PERI/Install.sh
index ad79c148c3..766cd8758c 100644
--- a/src/PERI/Install.sh
+++ b/src/PERI/Install.sh
@@ -1,6 +1,6 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp atom_vec_peri.cpp ..
   cp pair_peri_pmb.cpp ..
@@ -12,7 +12,7 @@ if (test $1 == 1) then
   cp fix_peri_neigh.h ..
   cp compute_damage_atom.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm -f ../atom_vec_peri.cpp
   rm -f ../pair_peri_pmb.cpp
diff --git a/src/POEMS/Install.sh b/src/POEMS/Install.sh
index 64819687d8..30b3f4823a 100644
--- a/src/POEMS/Install.sh
+++ b/src/POEMS/Install.sh
@@ -1,7 +1,7 @@
 # Install/unInstall package files in LAMMPS
 # edit Makefile.package to include/exclude POEMS library
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   sed -i -e 's/[^ \t]*poems //' ../Makefile.package
   sed -i -e 's|^PKG_INC =[ \t]*|&-I../../lib/poems |' ../Makefile.package
@@ -12,7 +12,7 @@ if (test $1 == 1) then
 
   cp fix_poems.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   sed -i -e 's/[^ \t]*poems //' ../Makefile.package
 
diff --git a/src/PRD/Install.sh b/src/PRD/Install.sh
index 81993f7c88..7c6da632ad 100644
--- a/src/PRD/Install.sh
+++ b/src/PRD/Install.sh
@@ -1,6 +1,6 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp compute_event_displace.cpp ..
   cp fix_event.cpp ..
@@ -10,7 +10,7 @@ if (test $1 == 1) then
   cp fix_event.h ..
   cp prd.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../compute_event_displace.cpp
   rm ../fix_event.cpp
diff --git a/src/REAX/Install.sh b/src/REAX/Install.sh
index b02636b1c5..4db0b0554b 100644
--- a/src/REAX/Install.sh
+++ b/src/REAX/Install.sh
@@ -1,7 +1,7 @@
 # Install/unInstall package files in LAMMPS
 # edit Makefile.package to include/exclude REAX library
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   sed -i -e 's/[^ \t]*reax //' ../Makefile.package
   sed -i -e 's/[^ \t]*reax_[^ \t]*) //' ../Makefile.package
@@ -18,7 +18,7 @@ if (test $1 == 1) then
   cp fix_reax_bonds.h ..
   cp fix_reax_bonds.cpp ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   sed -i -e 's/[^ \t]*reax //' ../Makefile.package
   sed -i -e 's/[^ \t]*reax_[^ \t]*) //' ../Makefile.package
diff --git a/src/USER-ACKLAND/Install.sh b/src/USER-ACKLAND/Install.sh
index 1b9cdd4674..fe76c02f7b 100644
--- a/src/USER-ACKLAND/Install.sh
+++ b/src/USER-ACKLAND/Install.sh
@@ -1,12 +1,12 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp compute_ackland_atom.cpp ..
 
   cp compute_ackland_atom.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../compute_ackland_atom.cpp
 
diff --git a/src/USER-ATC/Install.sh b/src/USER-ATC/Install.sh
index 5a0ad05a8c..e4a62c36d2 100755
--- a/src/USER-ATC/Install.sh
+++ b/src/USER-ATC/Install.sh
@@ -1,7 +1,7 @@
 # Install/unInstall package files in LAMMPS
 # edit Makefile.package to include/exclude ATC library
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   sed -i -e 's/[^ \t]*atc //' ../Makefile.package
   sed -i -e 's/[^ \t]*atc_[^ \t]*) //' ../Makefile.package
@@ -14,7 +14,7 @@ if (test $1 == 1) then
   cp fix_atc.h ..
   cp fix_atc.cpp ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   sed -i -e 's/[^ \t]*atc //' ../Makefile.package
   sed -i -e 's/[^ \t]*atc_[^ \t]*) //' ../Makefile.package
diff --git a/src/USER-CD-EAM/Install.sh b/src/USER-CD-EAM/Install.sh
index 256bdd71bd..b449a1340d 100755
--- a/src/USER-CD-EAM/Install.sh
+++ b/src/USER-CD-EAM/Install.sh
@@ -1,12 +1,12 @@
 # Install/Uninstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp pair_cdeam.cpp ..
 
   cp pair_cdeam.h ..
   
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../pair_cdeam.cpp
 
diff --git a/src/USER-CG-CMM/Install.sh b/src/USER-CG-CMM/Install.sh
index c984864999..2954dee31c 100644
--- a/src/USER-CG-CMM/Install.sh
+++ b/src/USER-CG-CMM/Install.sh
@@ -1,6 +1,6 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp angle_cg_cmm.h ..
   cp angle_cg_cmm.cpp ..
@@ -17,7 +17,7 @@ if (test $1 == 1) then
   cp pair_cg_cmm_coul_long.cpp ..
   cp pair_cg_cmm_coul_long.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../angle_cg_cmm.h
   rm ../angle_cg_cmm.cpp
diff --git a/src/USER-EWALDN/Install.sh b/src/USER-EWALDN/Install.sh
index f5b219ac60..b4135780a0 100644
--- a/src/USER-EWALDN/Install.sh
+++ b/src/USER-EWALDN/Install.sh
@@ -1,6 +1,6 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp -p ewald_n.cpp ..
   cp -p pair_buck_coul.cpp ..
@@ -13,7 +13,7 @@ if (test $1 == 1) then
   cp -p math_vector.h ..
   cp -p math_complex.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../ewald_n.cpp
   rm ../pair_buck_coul.cpp
diff --git a/src/USER-IMD/Install.sh b/src/USER-IMD/Install.sh
index 9021e52093..1bccf1faec 100644
--- a/src/USER-IMD/Install.sh
+++ b/src/USER-IMD/Install.sh
@@ -1,12 +1,12 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp -p fix_imd.cpp ..
 
   cp -p fix_imd.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../fix_imd.cpp
 
diff --git a/src/USER-SMD/Install.sh b/src/USER-SMD/Install.sh
index 4af72668b1..b85a20be69 100644
--- a/src/USER-SMD/Install.sh
+++ b/src/USER-SMD/Install.sh
@@ -1,12 +1,12 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp -p fix_smd.cpp ..
 
   cp -p fix_smd.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../fix_smd.cpp
 
diff --git a/src/XTC/Install.sh b/src/XTC/Install.sh
index 58536dfa91..70047ee8d3 100644
--- a/src/XTC/Install.sh
+++ b/src/XTC/Install.sh
@@ -1,6 +1,6 @@
 # Install/unInstall package files in LAMMPS
 
-if (test $1 == 1) then
+if (test $1 = 1) then
 
   cp dump_xtc.cpp ..
 
@@ -9,7 +9,7 @@ if (test $1 == 1) then
   cp xdr_compat.cpp ..
   cp xdr_compat.h ..
 
-elif (test $1 == 0) then
+elif (test $1 = 0) then
 
   rm ../dump_xtc.cpp