1 files changed, 10 insertions, 4 deletions

diff --git a/src/man/firejail.txt b/src/man/firejail.txt
index f27379a2d..1ee7ab1f1 100644
--- a/src/man/firejail.txt
+++ b/src/man/firejail.txt
@@ -1883,7 +1883,9 @@ $
 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
@@ -1893,7 +1895,7 @@ 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
@@ -1968,7 +1970,9 @@ $
 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
@@ -1983,7 +1987,9 @@ $ 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