salloc, sattach, sbcast, sdiag, sprio, sshare, strigger, sview, sh5util, scrun, scrontab: add pages (#11651)

pages/linux/sattach.md

@@ -0,0 +1,16 @@
+# sattach
+
+> Attach to a Slurm job step.
+> More information: <https://slurm.schedmd.com/sattach.html>.
+
+- Redirect the IO streams (`stdout`, `stderr`, and `stdin`) of a Slurm job step to the current terminal:
+
+`sattach {{jobid}}.{{stepid}}`
+
+- Use the current console's input as `stdin` to the specified task:
+
+`sattach --input-filter {{task_number}}`
+
+- Only redirect `stdin`/`stderr` of the specified task:
+
+`sattach --{{output|error}}-filter {{task_number}}`