Tag: programming languages

Use ls -l

Use sizeof()

Use filesize()

Use fstat()

Use getmemory()

Use sysctl()

Use freemem()

Use malloc()

A port to connect printer

A port to connect keyboard

An abstraction to pass data across processes

A hardware device

A mechanism to share non-sharable resources

A mechanism to access memory very fast

A mechanism to access kernel details

None

A printer queue

An IPC mechanism with destructive execute

An IPC mechanism with destructive write

An IPC mechanism with destructive read

No differences

IPC mechanism vs Non-IPC mechanism

Non-destructive read vs destructive read

Destructive read vs non-destructive read

sed 's/ */$//' test1

sed 's/ *$//' test1

sed 's/ *$//' test1

sed 's/ *$\/\/' test1

duplicate()

dup()

cp()

mknod()

Use chshell command

update the file /var/passwd

update the file /etc/users

update the file /etc/passwd

Both are Unix scheduling utilities

at is restricted one and crontab is not restricted

No difference

at takes input from user while cron takes from a confiuration file