mysqldump
manpage says:net_buffer_length
The initial size of the buffer for client/server communication. When creating multiple-row INSERT statements (as with the --extended-insert or --opt option), mysqldump creates rows up to net_buffer_length length. If you increase this variable, you should also ensure that the net_buffer_length variable in the MySQL server is at least this large.
android.provider.Settings.System
using a shell command. The answer is: SQLite
.umount: /mnt/test: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
lsof
and fuser
is quite common knowledge. However the use of the -v
option with lsof
is not. Eg. if you try to umount an NFS exported directory and run lsof
and fuser
, both will produce nothing. But the umount
still fails. If you run fuser
with the -v
option, it'll point out the culprit, namely the kernel's NFS code holding locks on the given partition (as explained here):# fuser -v -m /mnt/test
USER PID ACCESS COMMAND
/mnt/test: root kernel mount /mnt/test
apt-cache showpkg
on a meta package, the "Reverse Provides" section will list all of the available packages that fulfill the given role. Using awk
you can easily print out the list of packages that provide the given meta package.$ apt-cache showpkg telnet-client | awk '{if (f==1) print $1}/^Reverse Provides:/{f=1}' | sort
heimdal-clients
inetutils-telnet
krb5-clients
telnet
telnet-ssl
setfacl
commandline utility), but you might find that your permissions are not always honored. The culprit behind this is the mask.
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