2 files changed, 19 insertions, 7 deletions

diff --git a/src/man/firejail-profile.txt b/src/man/firejail-profile.txt
index ddb736e81..9d11add06 100644
--- a/src/man/firejail-profile.txt
+++ b/src/man/firejail-profile.txt
@@ -295,7 +295,9 @@ Use the options no3d, nodvd, nosound, notv, nou2f and novideo for additional res
 Build a new /etc in a temporary
 filesystem, and copy the files and directories in the list.
 The files and directories in the list must be expressed as relative to
-the /etc directory.
+the /etc directory, and must not contain the / character
+(e.g., /etc/foo must be expressed as foo, but /etc/foo/bar --
+expressed as foo/bar -- is disallowed).
 All modifications are discarded when the sandbox is closed.
 #ifdef HAVE_PRIVATE_HOME
 .TP
@@ -319,14 +321,18 @@ This feature is still under development, see \fBman 1 firejail\fR for some examp
 Build a new /opt in a temporary
 filesystem, and copy the files and directories in the list.
 The files and directories in the list must be expressed as relative to
-the /opt directory.
+the /opt directory, and must not contain the / character
+(e.g., /opt/foo must be expressed as foo, but /opt/foo/bar --
+expressed as foo/bar -- is disallowed).
 All modifications are discarded when the sandbox is closed.
 .TP
 \fBprivate-srv file,directory
 Build a new /srv in a temporary
 filesystem, and copy the files and directories in the list.
 The files and directories in the list must be expressed as relative to
-the /srv directory.
+the /srv directory, and must not contain the / character
+(e.g., /srv/foo must be expressed as foo, but /srv/foo/bar --
+expressed as foo/bar -- is disallowed).
 All modifications are discarded when the sandbox is closed.
 .TP
 \fBprivate-tmp
diff --git a/src/man/firejail.txt b/src/man/firejail.txt
index c0640c404..23ec23fb1 100644
--- a/src/man/firejail.txt
+++ b/src/man/firejail.txt
@@ -1892,7 +1892,9 @@ $
 Build a new /etc in a temporary
 filesystem, and copy the files and directories in the list.
 The files and directories in the list must be expressed as relative to
-the /etc directory.
+the /etc directory, and must not contain the / character
+(e.g., /etc/foo must be expressed as foo, but /etc/foo/bar --
+expressed as foo/bar -- is disallowed).
 If no listed file is found, /etc directory will be empty.
 All modifications are discarded when the sandbox is closed.
 .br
@@ -1902,7 +1904,7 @@ Example:
 .br
 $ firejail --private-etc=group,hostname,localtime, \\
 .br
-nsswitch.conf,passwd,resolv.conf,default/motd-news
+nsswitch.conf,passwd,resolv.conf
 #ifdef HAVE_PRIVATE_HOME
 .TP
 \fB\-\-private-home=file,directory
@@ -1977,7 +1979,9 @@ $
 Build a new /opt in a temporary
 filesystem, and copy the files and directories in the list.
 The files and directories in the list must be expressed as relative to
-the /opt directory.
+the /opt directory, and must not contain the / character
+(e.g., /opt/foo must be expressed as foo, but /opt/foo/bar --
+expressed as foo/bar -- is disallowed).
 If no listed file is found, /opt directory will be empty.
 All modifications are discarded when the sandbox is closed.
 .br
@@ -1992,7 +1996,9 @@ $ firejail --private-opt=firefox /opt/firefox/firefox
 Build a new /srv in a temporary
 filesystem, and copy the files and directories in the list.
 The files and directories in the list must be expressed as relative to
-the /srv directory.
+the /srv directory, and must not contain the / character
+(e.g., /opt/srv must be expressed as foo, but /srv/foo/bar --
+expressed as srv/bar -- is disallowed).
 If no listed file is found, /srv directory will be empty.
 All modifications are discarded when the sandbox is closed.
 .br