Linux How to remove all permissions on a file or directory and protect it Remove all permissions on directory perm_tes of Owner(u), Group(g), others(o) and all(a) chmod 000 perm_test
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chmod 0 perm_test
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chmod a=--- perm_test
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chmod a=- perm_test
Open Read permission of Owner on directory perm_tes chmod 400 perm_test
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chmod u=r perm_test
Open Read Write permission of Owner on directory perm_tes chmod 600 perm_test
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chmod u=rw perm_test
Open Read Write Exec permission of Owner on directory perm_tes chmod 700 perm_test
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chmod u=rwx perm_test
Open Read Write Exec permission of Owner on directory perm_tes and its all sub directories and files chmod 700 perm_test
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chmod u=rwx perm_test
Remove all permissions on file perm_test/address.txt of Owner chmod u=- perm_test/address.txt
Open Read permission of Owner on file address.txt chmod u=r perm_test/address.txt
Open Read Write permission of Owner on file address.txt chmod u=rw perm_test/address.txt
R emove all permissions on file perm_test/address.txt of group chmod g=- perm_test/address.txt
Open Read permission of group on file address.txt chmod g=r perm_test/address.txt
Open Read Write permission of group on file address.txt chmod g=rw perm_test/address.txt
Remove all permissions on file perm_test/address.txt of others chmod o=- perm_test/address.txt
Open Read permission of others on file address.txt chmod o=r perm_test/address.txt
Open Read Write permission of others on file address.txt chmod o=rw perm_test/address.txt
Remove all permissions on file perm_test/address.txt of owner and group chmod ug=- perm_test/address.txt
Remove all permissions on file perm_test/address.txt of owner,group and others chmod ugo=- perm_test/address.txt
Add Write permissions on file perm_test/address.txt for owner chmod u+w perm_test/address.txt
Add Write permissions on file perm_test/address.txt for owner and group chmod ug+w perm_test/address.txt
Add Read Write permissions on file perm_test/address.txt for owner and group chmod ug+rw perm_test/address.txt
Remove Write permissions on file perm_test/address.txt for owner chmod u+w perm_test/address.txt
Remove write permissions on file perm_test/address.txt for owner and group chmod ug-w perm_test/address.txt
Remove Read Write permissions on file perm_test/address.txt for owner and group chmod ug-rw perm_test/address.txt
Add Read Write permissions on file perm_test/address.txt for all (owner,group and others) chmod a+rw perm_test/address.txt
Remove Read Write permissions on file perm_test/address.txt for all (owner,group and others) chmod a-rw perm_test/address.txt
